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Senior Cost Accountant

Xcimer · Denver, CO

Finance / Accounting Denver, CO Posted May 19, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As a Senior Cost Accountant, you will apply your skills to oversee all aspects of accounting operations including general ledger, accounts payable, audit, and compliance functions while establishing robust financial controls, policies, and reporting systems that protect company assets and ensure regulatory compliance. The role demands excellence in supporting team members, developing cost accounting, and supporting a move in accounting infrastructure to new enterprise systems including ERP and government compliance tools. We are looking for an experienced accountant to apply their expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

Own the monthly, quarterly, and annual close processes, ensuring timely and accurate financial statements in accordance with US GAAP

Prepare and review journal entries, account reconciliations, and financial analyses

Maintain and enhance internal controls, accounting policies, and procedures

Oversee accounting and reporting for government grants and contracts, including cost-plus, cost sharing, fixed-price, and milestone-based arrangements

Ensure compliance with FAR and CAS audit requirements (as applicable)

Support government audits, grant reporting, incurred cost submissions, and compliance reviews

Partner with contracts and program management teams to ensure proper cost allocation and revenue recognition

Support team in exploring incentives available for tax credits by identifying programs that would fit our anticipated project spend

Complying with and documentation requirements for obtaining these tax credits and incentives.

Lead cost accounting for a capital-intensive manufacturing environment, including inventory, WIP, overhead allocation, and standard costing

Monitor capital expenditures, fixed assets, depreciation, and capitalization of equipment and tooling

Oversee accounting treatment for R&D activities, including capitalization vs. expense considerations

Track and report R&D costs by program, contract, or grant as required

Support R&D tax credit documentation and coordination with external advisors

Manage and mentor accounting staff or external resources as the company scales

Partner closely with engineering, operations, supply chain, and program management teams

Assist with system implementations, process improvements, and scalability initiatives

Qualifications

Education: Bachelor’s degree in accounting or finance

Experience: 5+ years of progressive accounting experience, including manufacturing or project-based environments

Strong knowledge of US GAAP, project and cost accounting, and internal controls

Extensive experience in implementing an integrated systems

Experience in government contracting/government cost accounting environment with strong understanding of FAR and CAS

Familiarity with government audits

Hands-on experience with inventory, WIP, fixed assets, and capital-intensive operations

Skilled people leader; passionate about developing talent

Excellent communicator; can articulate complex concepts to a varied audience.

Flexible and adaptable, with the ability to evaluate the need for change and the impact to the business; a builder

A hands-on leader, with a team-centered orientation, and a collaborative approach to problem solving.

Must be willing to work onsite at our Denver, CO facility.

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum

Desired

CPA

Experience in managing regulatory, commercial, and government audits

Ability to effectively manage multiple, large scale projects and dynamically shift focus and reprioritize when needed

Aerospace, defense, or advanced manufacturing industry experience

Experience with ERP systems

Experience supporting high-growth or pre-IPO companies

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Program Director - Directed Energy

Xcimer · Denver, CO

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Uncategorized Denver, CO Posted May 18, 2026

Xcimer Energy’s core mission is to enable practical fusion energy by delivering a step-change in laser performance and cost. We are developing the highest-energy excimer lasers on the planet, scaling high-energy, high-repetition-rate ultraviolet laser systems based on a breakthrough architecture and decades of deep science. While this technology is foundational to our fusion roadmap, it is also a platform with the potential to be game-changing for other demanding applications, including directed energy and broader national security missions. Xcimer is assembling a team of leaders in lasers, pulsed power, optics, controls, and manufacturing with a track record of rapid execution. Supported by leading investors and mission-aligned partners, we are positioned to transition our laser technology from R&D to prototype demonstration and ultimately to production-ready systems.

While our low-cost excimer laser technology is core to our fusion energy future, it also enables other exciting applications. As the Program Director, Directed Energy, you will lead end-to-end engineering execution for a high-visibility directed energy program centered on the excimer laser technology under development at Xcimer. You will drive delivery from early R&D through prototype demonstration and transition to production/fielding—owning technical performance, schedule, cost, and risk. This is a build-and-deliver role: you’ll run integrated product teams across engineering, science, manufacturing, supply chain, and quality to turn designs into tested hardware and verified capability. You will ensure the program delivers against commitments and is ready for integration and test in support of company objectives.

Responsibilities

Own end-to-end program execution of a hundred-million dollar element of work within a billion dollar development program: scope, WBS/IMS, cost, schedule, technical performance, and delivery commitments.

Establish and run program execution cadence (IPT rhythms, technical reviews, metrics) and provide clear, decision-oriented status to executives.

Lead integrated product teams (IPTs) across laser physics, optics, pulsed power, controls/software, thermal, mechanical, reliability, and safety to deliver integrated builds.

Build and manage budgets, staffing plans, and make/buy decisions; coordinate with Finance on forecasting and reporting.

Own program risk management: identify/quantify risks, drive mitigation plans, and manage technical and schedule margin.

Plan and execute system engineering events and reviews (SRR/PDR/CDR), test readiness reviews, integration events, and demonstrations; drive fast closure of actions and anomalies.

Lead execution with external partners—including prime integrators, subcontractors, and suppliers—defining technical interfaces, statements of work, deliverables, acceptance criteria, and on-time/quality performance.

Ensure program compliance and execution rigor (export controls/ITAR/EAR as applicable, security requirements, cybersecurity, configuration/data management, and laser/system safety).

Drive transition-to-integration readiness: produce integration packages (ICDs, test data, as-built/configuration records), support prime contractor integration, and ensure deliverables meet DoD-relevant qualification expectations

Qualifications

Education: Bachelor’s degree in Engineering, Physics, or a related field (Master’s preferred).

Experience: 15+ years leading delivery of complex hardware programs (electro-optical/laser systems strongly preferred), including multi-disciplinary engineering, build/integration, and test/verification; 5+ years leading cross-functional teams.

Demonstrated ownership of cost/schedule/technical performance, including building and managing an integrated master schedule and milestone-driven execution.

Technical fluency across relevant domains (lasers/optics, pulsed power, controls, thermal/mechanical, test & instrumentation) with the ability to drive trade studies and make decisions with technical leads.

Strong financial acumen with experience managing hundred-million-dollar budgets; EVMS/EIA-748 familiarity is a plus.

Strong technical communication skills: able to run design/test reviews, write crisp decision memos, and align stakeholders (engineering, manufacturing, quality, and external integrators) around the plan.

Proven leader who builds high-performing teams, sets clear accountability, and drives execution in matrixed environments.

Working knowledge of quality systems and product lifecycle practices (requirements management, configuration management, formal reviews, and corrective action).

Ability to operate in ambiguity and deliver results in an R&D-intensive, fast-moving organization; strong judgment and bias for action.

Must have an active U.S. government issued security clearance (secret or above) or the ability to obtain such in the future.

Desired

Experience transitioning R&D technology to prime contractors/integrators (interface control, integration support, qualification evidence, and production ramp readiness) for DoD programs.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Program Director - Site and Structures

Xcimer · Denver, CO

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Uncategorized Denver, CO Posted May 18, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

This is a full-time, onsite role based at our headquarters in Denver, CO.

As a Program Director for Site and Structures you will lead end-to-end development and delivery of facilities and site infrastructure, including planning, design, procurement strategy, construction oversight, commissioning, and transition to operations for the Vulcan laser system and Xcimer's fusion energy pilot plant, Athena. We are looking for our project coordinators to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

Lead end-to-end development and delivery of facilities and site infrastructure, including planning, design, procurement strategy, construction oversight, commissioning, and transition to operations.

Accountable for the integrated schedule for facility and site infrastructure delivery, ensuring alignment across engineering design, permitting, procurement, and construction sequencing.

Own the facility and site infrastructure project budget, including budget development, forecasting, and adherence to approved funding, with support from Finance and Program Planning & Controls for cost baseline setup and tracking.

Lead RFP development, evaluation, selection, and management of A/E firms, construction managers, EPC contractors, and other major facility vendors, ensuring adherence to contractual obligations.

Provide leadership and clear direction across multiple disciplines of engineering, manufacturing, supply chain, and individuals assigned to the project(s). Establish priorities, resolve conflicts, and hold individuals accountable for delivering against agreed cost and schedule targets.

Maintain updated cost and schedule forecasts from A/E firms, EPC contractors, and other major contractors to support program reporting and planning.

Define facility development strategy, contracting approach, and capital phasing aligned to program milestones.

Identify project risks early and lead mitigation planning to minimize schedule and cost impacts.

Ensure compliance with applicable codes, environmental regulations, safety standards, and internal governance processes.

Drive permitting strategy and utility coordination (power, water, HVAC, specialized infrastructure) to secure required approvals and capacity without impacting the project schedule.

Drive site readiness and facility integration efforts to ensure smooth transition from construction to operational use.

Qualifications

Experience: 12+ years of experience managing complex facility development, capital construction, or infrastructure projects in energy, aerospace, semiconductor, or similarly technical environments.

Educiation: Bachelor’s degree in engineering, construction management, or related field.

Demonstrated experience managing large capital projects (>$300M) from concept through commissioning.

Experience acting as the owner’s representative managing AE, EPC, or major construction contractors on complex capital projects.

Strong understanding of construction sequencing, contractor management, and cost control practices.

Experience defining and executing large-scale capital delivery strategies, including contract structuring, risk allocation, and contractor oversight for complex infrastructure projects.

Ability to manage budgets, forecasts, and change control processes in partnership with Finance and Program Planning & Controls teams.

Excellent communication and leadership skills with the ability to influence internal and external stakeholders.

Experience managing high-consequence or safety-critical construction environments.

Demonstrated ability to succeed in a matrix organization, driving execution, prioritization, and individual accountability without direct line authority.

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.

Desired

Experience delivering projects in regulated environments involving environmental review, utility interconnection, or nuclear-adjacent licensing.

Experience coordinating large utility loads (power, cooling water, gas systems) and site infrastructure upgrades.

Experience integrating specialized technical systems (high-voltage, vacuum, radiation-shielded, or process-intensive systems) into large facility builds.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Chief of Staff - Engineering

Xcimer · Denver, CO

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Executive Denver, CO Posted May 18, 2026

Xcimer Energy leverages decades of research in inertial fusion energy (IFE) combined with a novel, scalable laser architecture to deliver commercially viable fusion power plants. Our mission is to deploy fusion energy fast enough to materially impact global decarbonization.

As Xcimer’s engineering organization grows from six departments toward ten and beyond, we are seeking a Chief of Staff, Engineering to partner closely with the SVP of Engineering to scale execution, improve operational rigor, and ensure alignment across a rapidly expanding technical organization.

The Chief of Staff, Engineering acts as the operational and strategic extension of the SVP of Engineering. You will drive cross-departmental coordination and planning, improve core execution processes, and ensure consistent visibility into priorities, risks, and progress across the engineering organization. You will also maximize leadership efficiency by managing critical projects, facilitate communication, and drive organizational alignment.

Responsibilities

Engineering Operations & Execution

Drive and translate engineering strategy into actionable development frameworks across multiple departments and programs, ensuring alignment across department‑level R&D roadmaps, technology maturation paths, and platform architectures in support of Xcimer’s overall company objectives.

Establish and maintain engineering operating rhythms and team processes that enable fast, strategically aligned decision‑making, including developing meeting agendas, defining required inputs, and driving clear follow‑up and accountability.

Strengthen engineering operating rigor by defining and reinforcing common frameworks for R&D, design maturity, technical reviews, and engineering decision‑making.

Lead the collection and synthesis of engineering inputs into financial and operational planning processes to inform hiring, resourcing, and budgetary decisions.

Engineering Leadership Alignment

Act as a bridge between the SVP of Engineering and Engineering Directors to ensure consistent execution, clarity of ownership, and alignment on priorities.

Identify cross‑department dependencies and risks early and support timely escalation and resolution.

Represent engineering priorities, risks, and capacity in program planning and execution forums, ensuring programs are informed by timely, coherent, and technically mature engineering inputs.

Organizational Scaling & Capability Development

Support the evolution of the engineering organizational structure as the company scales.

Partner with Directors to clarify roles, responsibilities, and interfaces across departments and programs.

Hold Directors accountable through structure and visibility, including KPIs, standardized reporting, decision logs, and structured escalation mechanisms.

Metrics, Reporting, and Communication

Develop and track engineering KPIs that provide visibility into execution health, capacity, and risk.

Prepare concise, executive‑level materials for the SVP of Engineering and other senior leaders.

Ensure consistent communication of engineering priorities, decisions, and risks across the organization.

Strategic Engineering Initiatives

Lead cross‑department engineering initiatives that lack a single natural owner, including engineering process improvements, post‑mortems tied to technical execution and readiness, and cross‑discipline R&D coordination efforts.

Core Leadership Competencies

Strategic Thinking - Skilled at analyzing complex, ambiguous situations and translating insights into clear, actionable strategies that drive results.

Exceptional Communication - Delivers concise, high‑impact verbal and written communication tailored for senior‑level, cross‑functional, and high‑stakes environments.

Project Management - Proven ability to lead initiatives from conception through execution, ensuring alignment, accountability, and on‑time delivery.

Emotional Intelligence - Builds strong relationships across organizations; influences outcomes effectively without relying on positional authority.

Operational Acumen - Deep understanding of business operations, financial drivers, and organizational structures to inform sound decision‑making and efficient execution.

Qualifications

Bachelor's degree in Engineering, Physics, or related field.

10+ years' experience in complex technical organizations.

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum

Desired

Experience in deep-tech or high-reliability domains.

Prior Chief of Staff or senior operations experience.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Program Director - Fusion Systems

Xcimer · Denver, CO

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Uncategorized Denver, CO Posted May 18, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

This is a full-time, onsite role based at our headquarters in Denver, CO.

As the Program Director of Fusion Systems, you will apply your skills to define, plan, and deliver a hundred million to billion-dollar class engineering program from concept through completion, overseeing cross-functional teams to ensure technical excellence, budget adherence, and timely execution. We are looking for our engineers to apply their technical expertise, problem-solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

Oversee and accountable for the design, planning, and execution strategy of a large-scale, hundred million to billion-dollar class program, ensuring alignment with organizational objectives

Provide day-to-day leadership to matrixed engineering and design teams, maintaining technical integrity and quality standards

Lead system architecture, conceptualization and requirement definition

Manage project budgets, resource allocation, and schedules, implementing proactive risk mitigation and reporting on performance metrics

Collaborate with senior leadership and stakeholders, communicating program status,
risks, and opportunities for continuous improvement

Qualifications

Education: BS in physics, mechanical engineering, electrical engineering or related technical field

Experience: 10+ years leading large, complex programs (billion-dollar scale preferred) within an engineering-intensive environment (semiconductor, laser, nuclear, space and defense, etc.)

Proven track record of guiding large-scale technical teams through all phases of technical program delivery

Exceptional communication and stakeholder management skills, with the ability to influence at all levels of the organization

Demonstrated proficiency in one or more core engineering disciplines, such as Nuclear, Aerospace, Laser, Optics, Electrical or Mechanical

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.

Desired

Advanced degree (Master’s or Ph.D.) in a relevant engineering field

Experience with design and construction of one of a kind prototype systems

Familiarity with regulatory and compliance frameworks for high-value engineering
projects

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Project Delivery Manager

Xcimer · Denver, CO

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Project / Program Mgmt Denver, CO Posted May 18, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

This is a full-time, onsite role based at our headquarters in Denver, CO.

As a Project Delivery Manager, you will lead execution for a major Element within a multi-billion-dollar development program. Working in close partnership with the Element Director, you will sit at the center of day-to-day delivery, resolving friction as it arises, ensuring commitments are met, and providing leadership with a clear view of schedule and cost performance. We are looking for our project coordinators to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

Serve as the execution lead for the Element, driving day-to-day delivery performance across Engineering, Manufacturing, and Supply Chain in alignment with technical direction from designated engineering leads.

Translate subsystem-level objectives into coordinated, executable plans, and ensure cross-functional teams are operating against aligned priorities and commitments.

Own the integrated execution strategy and activity sequencing for the Element, partnering with Program Planning & Controls to maintain the formal schedule baseline and reporting structure.

Proactively identify integration risks, resource conflicts, and sequencing gaps; quantify impact and implement mitigation strategies in coordination with functional and program leadership.

Lead recovery planning and realignment efforts when performance deviates from the plan, ensuring corrective actions are clearly defined, owned, and driven to completion across teams.

Translate scope and design changes into clear execution, cost, and schedule impacts, enabling informed Program Director decision-making.

Analyze performance against schedule and cost baselines, identifying emerging risks and advising on corrective actions.

Work with engineering, manufacturing, and supply chain to continuously improve how work is planned, sequenced, and delivered.

Operate as an extension of the Program Director, with delegated deputy Program Director responsibilities for specific priorities.

Qualifications

Education: Bachelor’s degree in Engineering, Physics, or a related field (Master’s preferred).

Experience: 15+ years leading delivery of complex hardware programs (electro-optical/laser systems strongly preferred), including multi-disciplinary engineering, build/integration, and test/verification; 5+ years leading cross-functional teams.

Strong financial acumen with experience managing multi-million-dollar budgets; EVMS/EIA-748 familiarity is a plus.

Demonstrated experience managing integrated schedules within multidisciplinary engineering programs.

Experience resolving resource conflicts across engineering, manufacturing, and supporting functions in complex development environments.

Experience leading recovery efforts and coordinating cross-functional teams to address schedule or integration challenges.

Experience working against cost baselines and supporting cost/schedule performance analysis in development programs.

Demonstrated ability to identify execution risks early and implement structured, data-informed mitigation strategies.

Experience partnering effectively with Program Planning & Controls organizations to maintain disciplined schedule and cost baselines.

Excellent communication and interpersonal skills with the ability to influence technical stakeholders without direct authority.

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.

Desired

Experience supporting technology maturation and manufacturing scale-up within complex hardware development programs.

Background in hardware integration and system-level test campaigns, including readiness reviews and build sequencing.

Familiarity with structured risk management practices, including quantitative schedule risk assessment, to protect delivery commitments.

Demonstrated capability integrating supplier schedules, long-lead procurement, and manufacturing readiness into element-level execution plans.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Facilities Maintenance Technician

Xcimer · Denver, CO

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Skilled Trades / Field Denver, CO Posted May 13, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As a Facilities Maintenance Technician you will play a critical role in the daily operations and maintenance of our laser development facility and headquarters in Denver, CO. With nearly 80,000 square feet of building and associated utilities, you will not only be responsible for the planning, installation and performance of preventive and corrective maintenance, and unplanned servicing of facility systems and manufacturing equipment, but also assist in responding to trouble calls where your skills may also apply. We are looking for our technicians, engineers and scientists to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

Perform hands on maintenance, install and/or repairs of facilities and equipment and electrical infrastructure.

Provide general technical, mechanical and electrical support on the facility and capital equipment.

Source, order, and confirm receipt of project materials.  

Serve as an interface with contractors for electrical, HVAC, security, fire suppression, compressors, backflows, mobile equipment, etc.

Maintain proper LOTO procedures.

Overhead Crane inspection support at various heights up to 60ft.

Operate forklifts as needed.

This is a cross functional position supporting the entire Xcimer team.

Qualifications

Must be able to stoop, kneel, crouch, or crawl, capable of lifting and/or moving up to 50 pounds unassisted for an extended period.

Knowledge of industrial facility infrastructure and maintenance.

Familiarity with OSHA 10/30 industrial safety standards.

Strong mechanical skills, but also a creative and flexible attitude to take on additional responsibilities.

Knowledge of Microsoft Word, excel, project, and PowerPoint programs.

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum.

Required

Forklift experience.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Control Systems Engineer – Test & Measurement

Xcimer · Denver, CO

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DevOps / SRE / Infra Denver, CO Posted May 7, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As a Control Systems Engineer – Test & Measurement, you will apply your skills to the design, implementation, verification, and commissioning of complex test and measurement systems used to validate advanced hardware and subsystems. We are looking for an engineer who brings strong diagnostic thinking, hands-on test stand experience, and demonstrable software capability to ensure systems are correct, reliable, and fit for purpose.

Responsibilities

Design, develop, and commission control systems for test and measurement applications, including laboratory and industrial test stands.
Lead or contribute to verification and validation (V&V) activities, including test planning, test procedure development, execution, and reporting.
Develop control, automation, and data acquisition software using Python, LabVIEW, and related tools.
Integrate hardware and software for test systems, including instrumentation, DAQ hardware, off-the-shelf benchtop equipment, and custom hardware.
Apply diagnostic and systems-level troubleshooting methodologies to identify root causes of system, software, or hardware issues.
Implement and maintain automated test frameworks, unit tests, and regression tests to support reliable system evolution.
Interface with and integrate a wide range of communication protocols and interfaces such as RS‑232/422/485, TCP/IP, Ethernet-based fieldbuses such as EtherCAT, and instrument control protocols.
Participate in requirements development, traceability, and documentation to support structured V&V and quality processes.
Collaborate closely with electrical, mechanical, and software engineers to ensure test systems accurately represent real-world operating conditions.
Support commissioning activities, acceptance testing, and ongoing lifecycle support for test infrastructure.

Qualifications

Education: Bachelor’s degree in Electrical Engineering, Controls Engineering, Computer Engineering, or a related field.
Experience: 3+ years of experience in control systems engineering, with a strong emphasis on test and measurement or validation environments.
Demonstrated experience designing and commissioning test stands, automated test equipment (ATE), or experimental systems.
Proficiency in Python and LabVIEW, including development of maintainable, version-controlled code.
Strong working knowledge of verification and validation methodologies, including test planning and execution and requirements tracking such as with a Requirements Traceability Matrix.
Experience with version control systems (e.g., Git) and modern software development workflows.
Working knowledge of unit testing, automated testing, or test-driven development concepts.
Familiarity with industrial and laboratory communication protocols (e.g., RS‑232, TCP/IP, Ethernet-based protocols).
Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.

Desired

Experience with advanced architectural concepts, such as an Actor framework
Experience with industrial control platforms such as PLC/PAC systems, real-time controllers, or distributed control SCADA systems, such as Ignition or Wonderware.
Familiarity with publication/subscription based protocols such as OPC UA
Familiarity with instrumentation standards and interfaces (e.g., SCPI, GPIB, USB instruments).
Experience with DAQ systems, high-speed data capture, or synchronization/timing systems.
Exposure to systems integration best practices commonly used by professional control system integrators (e.g., lifecycle documentation, change control, structured testing).
Knowledge of safety-related control concepts, interlocks, or fail-safe system design.
Experience supporting testing in R&D, prototype, or experimental environments.
Familiarity with documentation standards such as test plans, test procedures, verification matrices, and commissioning reports.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Systems Engineer

Xcimer · Denver, CO

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DevOps / SRE / Infra Denver, CO Posted May 6, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As a Systems Engineer, you will apply your skills to define requirements, execute architectural design analyses, manage complex system interfaces, and lead verification and validation on fusion energy systems. Your activities will span risk management, configuration and data management, integrated test planning, technical performance measurement management, and lifecycle baseline management. We are looking for our engineers to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

Carry out systems engineering activities in accordance with tailored system engineering standards and practices.

Develop, manage and allocate systems requirements & interfaces

Manage and execute gated design and operational reviews including PDR and CDR

Drive and coordinate technical decision making

Conduct risk assessments and ensure risk mitigation plans are developed and implemented

Develop, review, and assess verification artifacts

Act as the negotiator between multiple teams to ensure the system is holistically optimized

Develop strategies & approaches for specialty engineering (operability, reliability, maintainability, supportability) integration, analysis and verification

Qualifications

Education: Minimum of a B.S. degree in engineering or other technical field (e.g. mechanical, electrical, systems, etc.)

Experience: 5+ years of Systems Engineering experience working on development programs for large, complex, integrated systems – preferably from the fusion, aerospace, or space and defense industry

Proficiency in executing at least two of the following SE activities:

Requirements Development; Architectural Design; Interface Management; V&V; System Analysis; Risk Management; Configuration Management

Experience with systems engineering tools (Jira, Confluence, Flow, Teamcenter)

Great communication skills, ability to work effectively in teams, demonstrated execution and coordination skills

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum.

Desired

Experience with high energy laser systems, optics or fusion energy systems

INCOSE ASEP or CSEP certification

Risk and Opportunity Management experience

Basic project management skills including labor estimating and schedule management

Demonstrated configuration management experience

Demonstrated Model Based Systems Engineering (MBSE) experience

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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IT Support Technician

Xcimer · Denver, CO

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Uncategorized Denver, CO Posted May 1, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As an IT Support Technician, you will apply your skills to service and maintain a broad collection of IT systems while increasing our operational efficiency. We are looking for our support staff members to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

Provide IT Help Desk support and assistance for all members at Xcimer 

Setup, configure and maintain machines and workspaces for employees 

Assist administrators with troubleshooting and resolving IT incidents involving both hardware and software

Assist with the monitoring and maintenance of critical IT infrastructure including network stacks, data centers, cloud servers and enterprise software systems

Develop training documentation and material to facilitate IT policies and onboard new hires

Document, categorize, and prioritize IT issues to ensure efficient escalation to senior IT personnel when necessary Enforce security policies and collaborate on their development and implementation

Work closely with software and hardware engineering teams to ensure smooth operations 

Qualifications

Education: Associate’s degree (or equivalent) in information technology, information systems, networking or related fields

Experience: 2+ years of experience as an IT support staff member

Experience supporting hybrid environments with both Windows and MacOS systems

Experience supporting Microsoft 365 Suite, Exchange, Teams, OneDrive and Intune environments

Working knowledge of best practices in IT administration and system security

Excellent technical and interpersonal communication skills

Comfortable in a fast-paced, dynamic, and ambiguous environment 

A positive attitude, with a customer service-oriented approach and a passion for working with people 

Ability to earn trust and maintain positive and professional relationships 

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum 

Desired

Familiar with Agile project management software and processes (Atlassian suite, Trello, etc.)

Experience with on-premises server and database management

Ability to set up automated workflows as scheduled scripts or batch jobs

Knowledge of scripting languages (Javascript, Python, Ansible, etc.)

Experience developing integrations via webhook or REST API

Previous experience with NIST 800-171 or other government security focused standard

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Adaptive Optics Engineer

Xcimer · Denver, CO

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Engineering Denver, CO Posted May 1, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As an Adaptive Optics Engineer/Scientist, you will apply your skills to design, model, and implement high-performance adaptive optics systems for next-generation laser technology. You will play a critical role in developing advanced wave-optics simulation tools, creating and optimizing control algorithms, and supporting the integration and operation of adaptive optics hardware on high-energy laser platforms. Your work will directly contribute to improving beam quality, stability, and system performance, enabling the delivery of unprecedented laser capabilities for IFE. We are looking for our engineers and scientists to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

Develop new optimization routines for the adaptive optics loop.

Coordination and close collaboration with vendors to develop and drive the 'next generation' of AO platforms for Xcimer’s needs with a focus around deformable mirrors and wavefront sensors.

Assist in aligning, calibrating, and running adaptive optics hardware on a laser system.

Assist in characterizing and understanding the optical environment to set requirements for an adaptive optics system.

Leverage and improve wave-optics propagation code to model the laser systems.

Qualifications

Education: B.S. degree in optical science/engineering, or related field.

Experience: 5+ years of optical science/engineering experience directly related to adaptive optics systems.

Experience working with multi-disciplinary engineering fields including optical, opto-mechanical, software, and controls systems.

Experience in developing adaptive optics systems using best practices and optimization methods using wavefront sensors and deformable mirrors.

Experience in high fidelity physical wave-optics propagation in the near and far fields.

Experience in optical subsystem integration and alignment.

Desired

M.S. or Ph.D. degree in optical engineering/science, or related field.

10+ years of optical science/engineering experience directly related to adaptive optics.

Experience in characterizing turbulence in beam paths and developing Fourier based wave optics models for beam propagation.

Experience in the design of adaptive optics coupled with beam pointing stabilization systems.

Experience in high energy optical systems working in the deep UV.

Experience in defining and setting adaptive optics-based requirements from system to component level.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Senior Optical Engineer - Stray Light

Xcimer · Denver, CO

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Engineering Denver, CO Posted Apr 29, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

This is a full-time, onsite role based at our headquarters in Denver, CO.

As a Senior Stray Light Optical Engineer, you will be the primary technical authority on non-sequential ray tracing and stray light mitigation. Your work will focus on modeling and designing complex optical layouts to identify and mitigate ghosts, hot spots, fringing effects, and other parasitic light paths that could degrade system performance or cause optical damage.

In this highly collaborative role, you will work closely with sequential optical designers, opto-mechanical engineers, material scientists, and optical systems engineers. You will implement mechanical feature models (e.g., baffles, beam dumps) directly into non-sequential software to validate their effectiveness. You will also write custom scripts to automate complex analyses and process large datasets, ensuring our high-energy DUV systems operate safely and efficiently.

Responsibilities

Perform comprehensive non-sequential ray tracing (primarily using FRED software) to analyze stray light, ghost reflections, scattering, and diffraction in high-energy DUV laser systems.

Identify and mitigate high-fluence "hot spots" and fringing effects to prevent optical damage and ensure system longevity.

Implement and evaluate mechanical feature models (such as baffles, apertures, and beam dumps) within non-sequential environments to actively mitigate stray light.

Write and maintain custom scripts (e.g., Python, MATLAB, or FRED script) to automate ray trace simulations, process large datasets, interface to other analysis tools and quantify system-level signal degradation.

Collaborate cross-functionally with sequential optical designers to optimize system layouts for stray light performance.

Work closely with opto-mechanical engineers to design and validate physical stray light mitigation hardware.

Partner with material scientists to evaluate Bidirectional Scattering Distribution Functions (BSDF/BRDF), surface roughness, and specialized UV-resilient absorptive coatings/materials.

Collaborate with Optical Systems Engineers to ensure stray light requirements are defined, met, and verified at the system level for ICF applications.

Qualifications

Education: B.S. or M.S. degree in Optical Engineering, Physics, or a closely related field.

Experience: 5+ years of dedicated experience in stray light analysis and non-sequential optomechanical modeling.

Expert-level proficiency in non-sequential optical design software, with a strong preference for FRED.

Demonstrated experience writing scripts to automate optical analysis and process ray trace data.

Strong understanding of stray light mitigation techniques, including the implementation of mechanical features (baffles, beam dumps) in optical models.

Solid foundation in physical optics, scattering (BSDF/BRDF), and diffraction.

Proven ability to work in a cross-collaborative environment with multi-disciplinary engineering teams.

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.

Desired

Ph.D. in Optical Engineering, Physics, or related field.

8+ years of experience in stray light analysis for high-energy laser systems or deep UV (DUV) applications.

Experience with Laser Induced Damage Thresholds (LIDT) and material fluorescence in the DUV regime.

Specific experience working on laser systems for Inertial Confinement Fusion (ICF) or similar high-fluence beam delivery systems.

Familiarity with stray light measurement instrumentation (e.g., scatterometers) to correlate empirical data with simulation models.

Experience importing and managing complex CAD geometry within FRED or other non-sequential optical simulation environments.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Pulsed Power Modeling and Simulation Engineer

Xcimer · Denver, CO

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Engineering Denver, CO Posted Apr 29, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

This is a full-time, onsite role based at our headquarters in Denver, CO.

As a Pulsed Power Simulation & Modeling Engineer, you will apply your skills to creating models of, and simulating cutting-edge pulsed power electrical and mechanical systems. This role encompasses the use of multi-physics and electromagnetics solvers to aid in the design and optimization of associated systems and components. We are looking for our Pulsed Power Simulation & Modeling Engineer to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

Work with pulsed power design engineers to generate models of systems and components

Work with a multidisciplinary team to create, optimize and validate models of complex physical processes and phenomena.

Aid in the design of experiments for validation of models against real-world data

Work with design engineers to enhance the workflow from concept to final print based upon optimizations in simulation.

Qualifications

Education: B.S. or M.S.in Mechanical or Electrical Engineering

Experience: 2+ years of experience with field solver/particle-in-cell/circuit simulation codes

Strong communication skills across disciplines and departments

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum

Desired

Proficiency in COMSOL, CST and/or LT-SPICE

Proficiency in solid-modeling software, e.g. SolidWorks or NX

Strong knowledge of electromagnetic field principles

Mechanical design skills – knowledge of GD&T principles a plus

Proficiency with Python and/or MATLAB. Experience with VBA and Java a plus

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Pulsed Power Physicist

Xcimer · Denver, CO

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Research / Science Denver, CO Posted Apr 29, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

This is a full-time, onsite role based at our headquarters in Denver, CO.

As a Pulsed Power Physicist, you will work on the science and engineering of electron-beam cathode systems for Xcimer's pulsed power driven inertial fusion energy program. The core goal is maximizing beam efficiency and energy deposition on target. You will lead cathode development across multiple emitter technologies , design and optimize hibachi foil/anode structures for beam transport, and build complex experimental systems from concept through commissioning. This role carries significant independent scientific responsibility. We want someone who is strong in both theory and experiment and rigorous about documentation.

Responsibilities

Optimize beam efficiency and energy deposition on target

Lead design, fabrication, and testing of cathode systems across multiple emitter technologies (explosive emission, thermionic, photocathodes)

Design and optimize hibachi foil/anode grid structures for beam transport efficiency

Lead experimental campaigns end-to-end

Develop and validate cathode and beam transport models (analytical, PIC, SPICE) to guide design decisions; roughly equal balance of modeling and experimental work

Operate and maintain UHV vacuum systems (target < 10^-9 Torr) including bakeout, leak checking, and pumping systems

Survey prior art on emitter technologies, beam transport, and cathode physics

Own experimental program documentation: test reports, design records, operating procedures, and data management

Manage hardware procurement, BOM tracking, and vendor relationships for cathode subsystems

Interface with potential commercial emitter suppliers on procurement, packaging, and quality

Support integration of cathode systems into larger diode and laser architectures

Qualifications

Education: PhD in physics, electrical engineering, or closely related field (MS with exceptional relevant experience considered)

Deep expertise in beam diagnostics (Faraday cups, beam imaging, energy analysis, calorimetry)

Hands-on experience with vacuum electronics and electron-beam generation

Able to independently design experiments, interpret results, and write up findings clearly

Experience building and commissioning complex experimental systems end-to-end (mechanical, electrical, vacuum, controls)

Familiarity with high-voltage pulsed power systems (100 kV+)

Proficiency with lab instrumentation (SMUs, oscilloscopes, HV power supplies)

Comfortable working across mechanical, electrical, and physics domains in a small team

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.

Desired

Direct experience with explosive emission, or cold cathode technologies

Familiarity with semiconductor fabrication processes

Experience with PIC or beam optics simulation codes (e.g., Chicago, CST, COMSOL)

Background in beam transport optimization

Track record of thorough technical documentation and hardware program management (procurement, scheduling, vendor coordination)

Background in excimer laser or inertial fusion energy systems

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Senior Structural Analyst

Xcimer · Denver, CO

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Data / Analytics Denver, CO Posted Apr 27, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As a Senior Structural Analyst, you will perform structural and mechanical analyses using classic hand calculations and finite element model (FEM) simulations to support design, manufacturing, assembly, and test. A thorough understanding of structural behavior, static and dynamic loading, and margins is required to achieve system performance and cost-optimized designs. You will create concise, accurate analysis documentation; perform peer reviews of analysis and reports; and provide analysis guidance to design engineers and junior analysts. As hardware matures from prototype builds through integrated test campaigns, you will also help resolve nonconformances, support root-cause investigations, and enable rapid iteration through close collaboration with engineering and operations.

Responsibilities

Perform structural and mechanical analyses for opto-mechanical, thermal-mechanical, fluid-structure interactions, and support-structure hardware to support design, manufacturing, assembly, and test.

Validate finite element models based on internal and external data.

Create analysis documentation that is concise, accurate, and traceable; produce reports supporting design reviews and test readiness.

Perform peer reviews of analysis and reports generated by other team members and incorporate feedback.

Provide analysis guidance to design engineers and mentor junior analysts; help establish best practices for modeling, margins, and documentation.

Support prototype builds and test operations by troubleshooting structural/mechanical issues, dispositioning nonconformances, and recommending corrective actions.

Qualifications

Education: B.S. degree in mechanical engineering (or a related engineering field).

Experience: 8+ years of structural/mechanical analysis experience supporting engineered hardware (e.g., energy, aerospace, automotive, or high-precision machines).

Experience with one or more commercial FEA tools (e.g., Altair, ANSYS, Abaqus, Nastran) and best practices for model verification/validation.

Demonstrated knowledge of load paths and stress analysis bolted joints, weldments, frames, mounts, and pressure-containing components.

Demonstrated experience with static and dynamic FEM simulations.

Strong fundamentals in classical mechanics of materials and structural sizing methods (hand calculations, closed-form solutions).

Knowledge of engineering materials, manufacturing processes, and how they influence structural performance, tolerances, and reliability.

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.

Desired

M.S. degree in mechanical engineering (or equivalent advanced degree/experience).

Experience supporting test campaigns, instrumentation/strain gauging, and correlation of analysis to test results.

Proficiency with Altair Optistruct and Radioss

Experience with nonlinear materials, vibration, fatigue, creep, high temperatures, and ceramic materials.

Experience applying ASME Boiler and Pressure Vessel Code requirements to analyses.

Demonstrated experience using scripting languages (e.g., Python, MATLAB, VBA) to automate analyses, post-process results, and improve repeatability and efficiency.

CAD and PLM experience (NX and Teamcenter)

Multiphysics simulation development and validation

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Shot Director (Senior Test Engineer) – Laser System Operations

Xcimer · Denver, CO

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QA / Test Denver, CO Posted Apr 27, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As a Shot Director (Senior Test Engineer), you serve as the senior operational authority for the safe, disciplined, and effective execution of laser shot operations. During assigned shifts, you lead shot execution, coordinating system leads, operators, diagnostics, and safety functions to ensure operational readiness, compliance with operating limits, and successful test outcomes. You collaborate with peer Shot Directors to review and refine experiment requests and execution plans, streamlining scope and workflows to reduce inefficiencies and improve test throughput. Following shot execution, you analyze, review, and present shot data in close collaboration with Science Team customers.

When the facility transitions to maintenance mode, operational authority is formally handed over to the Beamline Lead and Pulsed Power Lead. During these times, you will support the leads as needed with troubleshooting or other work. In addition to leading live shot operations, the Shot Director owns and leads continuous improvement of the shot operations infrastructure, including procedures, operating limits, alerts, operator notes, and checklists that enable safe and repeatable operations.

Responsibilities

Serve as the single point of authority for all shot activities during shot operations.

Lead and execute laser shot operations, including conducting pre-shot readiness reviews and authorizing shot execution, holds, stand-downs.

Maintain situational awareness during countdowns and shots, responding decisively to anomalies or off-nominal conditions.

Coordinate system controllers, operators, safety personnel, and experimenters during shot execution.

Coordinate daily shot schedule with other departments to reduce downtime.

Manage formal transitions between Operations Mode and Maintenance Mode, including clear handoff of system authority and status to the Beamline Lead and Pulsed Power Lead.

Lead post-shot reviews, document shot results, and drive resolution of anomalies and lessons learned.

Own and continuously improve shot operations infrastructure, including procedures, operating limits, alerts, operator notes, checklists, and readiness tools.

Drive operational discipline, standardization, and continuous improvement across the shot operations program.

Enforce compliance with safety requirements, operating limits, and configuration controls during shot operations.

Qualifications

Education: Bachelor’s degree in engineering, physics, or a related technical field.

Experience: 8+ years experience operating or testing complex, high-risk technical systems. (e.g. experience as a Launch Director or Test Engineer/ Test Director)

Demonstrated experience leading time-critical operations and making sound decisions under pressure.

Strong systems-thinking skills and experience working across multidisciplinary technical teams.

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.

Must be willing to work a set 8-hour shift with defined start and stop times, and work extended hours during critical operational periods.

Desired

Master’s degree or higher in engineering, physics, or a related field.

Prior experience as a Test Engineer, Test or Launch Director, Commissioning Lead, or equivalent role.

Familiarity with laser systems, pulsed power systems, beamline operations, or experimental diagnostics.

Experience developing operational procedures, checklists, and readiness or certification processes.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Mechanical Engineer

Xcimer · Denver, CO

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Mechanical Engineering Denver, CO Posted Apr 24, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As a Mechanical Engineer, you will play a critical role in the design, analysis, build, and operation of laser, pulsed power, vacuum vessel, and ancillary mechanical systems that are central to Xcimer’s excimer‑laser‑based IFE technology. You will contribute across the full product lifecycle—from early prototype systems through the design and demonstration of a power‑producing inertial fusion reactor. We are seeking engineers who bring strong technical depth, hands‑on problem-solving skills, and a passion for building high‑performance hardware that will redefine the future of energy.

Responsibilities

Design and perform structural & thermal analysis for laser components, pulsed power, vacuum, and optical conditioning components using finite element analysis (FEA) for static as well as transient conditions.

Create 3D models, detail part drawings, assemblies, P&ID’s and interface control documents.

Design pressure and vacuum vessel components, perform proof-tests to code standards.

Communicate and document design with mechanical, systems, laser and optical engineering and manufacturing team members.

Support procurement of the hardware for the prototype laser amplifiers and optical conditioning equipment.

Oversee and assist assembly by a team of interdisciplinary technicians.

Support ongoing operation of the subject equipment and systems.

Continue above roles and responsibilities to participate in subsequent amplifier up-scaling leading to that which is needed for a power-producing IFE reactor.

Participate in concept studies supporting the use of these lasers in a power-producing IFE reactor, and other applications.

Contribute to authoring work instructions, test plans, specifications, and other documentation for the integration and operation of complex systems of systems

Provide manufacturing and production support and first-time engineering builds

Participate in subsystem test planning, execution, data reduction and analysis

Work with cross-functional teams that are responsible for selecting materials, manufacturing processes, and suppliers to produce world class hardware.

Plan, coordinate, conduct tests, and review test data

Maintain and report on activity schedule, budget and technical status

Identify opportunities for improvements and operational cost savings

Qualifications

Education: B.S. degree in engineering (or equivalent discipline).
Experience: 5+ years of experience engineering vacuum or gas delivery systems.
Proven experience in vacuum system design and/or test.
Experience in selecting pumps and instruments.
Strong understanding of valves, pressure vessels, flex elements, fittings, and related hardware.
Knowledge of fabrication and integration processes, including tubing/piping and machined components.
Working knowledge of materials, coatings, and treatments.
Hands‑on experience troubleshooting hardware.
Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.

Desired

Experience with high‑vacuum systems and cryogenic pumps.
Familiarity with noble and reactive gas properties.
Experience designing valves and other fluid components.
Background with data acquisition systems.
Experience with orbital tube welding processes.
Experience with abatement systems.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Control Systems Engineer – Manufacturing & Automation

Xcimer · Denver, CO

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DevOps / SRE / Infra Denver, CO Posted Apr 21, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As a Control Systems Engineer – Manufacturing & Automation, you will apply your expertise in industrial automation and PLC-based control systems to design, stand up, and support advanced manufacturing and assembly lines. You will work hands-on with PLCs, robotics, safety systems, fieldbus networks, and industrial IO to enable reliable, scalable, and repeatable production systems. We are looking for engineers who enjoy building systems from concept through commissioning and thrive in fast-paced manufacturing environments.

Responsibilities

Design, develop, and commission PLC‑based control systems across process, manufacturing cells, motion control, and building automation, owning the work from initial concept through production deployment and operational handoff.
Support the stand-up of new manufacturing lines, including greenfield and brownfield deployments, equipment integration, and factory acceptance testing
Program and debug PLC software using IEC 61131-3 languages (Structured Text preferred), with a focus on readable, modular, and maintainable code with object oriented programming
Integrate and commission industrial robotics systems for part handling, assembly, inspection, and material movement
Develop and configure fieldbus and industrial networking architectures, with a strong emphasis on EtherCAT-based systems
Implement machine safety systems and interlocks in compliance with applicable safety standards (e.g., ANSI/RIA, ISO, OSHA), including the application of functional safety principles such as SIL or Performance Level (PL) where required
Design and review electrical control schematics, panel layouts, and P&IDs in coordination with Electrical Engineering and external vendors
Develop HMIs that balance operator usability with effective diagnostics and troubleshooting capability
Interface machine-level control systems with higher-level manufacturing systems such as SCADA, MES, and data historians
Troubleshoot and optimize automated equipment to improve throughput, yield, uptime, and overall equipment effectiveness (OEE)
Collaborate closely with Mechanical Engineering, Manufacturing Engineering, Quality, and Operations throughout the equipment lifecycle
Support creation, deployment, and handoff of documentation into production, including operator and maintenance training
Work with external machine builders, integrators, and suppliers to ensure system performance and compliance

Qualifications

Education: Bachelor’s degree in Electrical Engineering, Controls Engineering, Mechatronics, or a related technical discipline
Experience: 3+ years of hands-on experience developing and commissioning control systems for manufacturing or industrial automation environments
Strong experience with PLC platforms used in manufacturing environments (e.g., Beckhoff, Siemens, Rockwell, or equivalent)
Demonstrated experience standing up or supporting process, manufacturing, or assembly lines, including integration of multiple machines or subsystems
Proficiency with industrial fieldbus and communication protocols, including EtherCAT (required); experience with Profinet, Ethernet/IP, CAN, or Modbus is a plus
Experience integrating sensors, actuators, servo drives, VFDs, and distributed IO in machine control systems
Solid understanding of industrial electrical systems, control panels, and relevant codes and standards (e.g., NFPA 79, NEC, UL 508A)
Strong troubleshooting skills across software, electrical, and system-level issues
Ability to work hands-on in a factory or lab environment, including occasional lifting, standing, and on-equipment debugging
Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum

Desired

Experience with Beckhoff TwinCAT, including EtherCAT configuration and distributed motion control
Experience integrating industrial robots (e.g., FANUC, ABB, KUKA, Universal Robots)
Familiarity with functional safety concepts such as safety PLCs, safety IO, and safe motion
Experience with machine vision systems used for inspection or alignment
Experience with SCADA platforms (e.g., Ignition) and production data collection
Experience supporting automated systems in a production or high-volume manufacturing environment
Familiarity with version control, code standards, and structured documentation practices for control systems
Greenfield manufacturing startup or rapid scale-up experience

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Optical Control Systems Engineer

Xcimer · Denver, CO

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DevOps / SRE / Infra Denver, CO Posted Apr 16, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As an Optical Control Systems Engineer, you will play a critical role in the design, implementation, and validation of precision optical control systems for high‑energy laser facilities. You will develop and validate advanced adaptive optics (AO) control algorithms, integrate real‑time optical sensing and actuation hardware, and support time‑of‑flight (TOF)–based tracking and synchronization systems for target insertion and laser‑target engagement. This role spans algorithm development, hardware integration, and system‑level validation in an operational laser environment.

We are seeking an engineer who combines deep optics and controls expertise with hands‑on system integration experience, and who thrives in solving multi‑disciplinary problems at the limits of precision, timing, and speed.

Responsibilities

Design, implement, and tune adaptive optics control algorithms for high‑energy laser systems, including wavefront correction, beam pointing, and jitter rejection
Develop control strategies for fast steering mirrors (FSMs) and slow steering mirrors (SSMs), including multi‑loop, multi‑rate, and hierarchical control architectures
Integrate and commission beam diagnostics and position sensors, such as wavefront sensors, quad cells, high-speed cameras, and wave meters, into real‑time closed‑loop optical control systems
Design, implement, and validate time‑of‑flight (TOF)–based tracking, synchronization, and timing systems for target insertion, engagement timing, and laser coordination
Perform system‑level modeling and analysis of optical control performance, including latency, bandwidth, stability margins, noise propagation, and timing error budgets
Plan and execute laboratory, subsystem, and in‑situ commissioning tests to validate algorithms and control performance against system requirements
Collaborate with laser physics, optical, mechanical, electrical, and controls teams to define system interfaces, sensor/actuator placement, and operational concepts
Generate and maintain rigorous technical documentation, including control specifications, algorithm descriptions, requirements, interface definitions, test plans, and validation reports
Support technical reviews (SRR, PDR, CDR, TRR) with quantitative analysis and experimental data
Support system commissioning, operations, and iterative performance improvement of deployed optical control systems

Qualifications

Education: Bachelor's degree or higher in Optical Engineering, Electrical Engineering, Mechanical Engineering, Physics, Mechatronics, or a closely related field
Experience: 5+ years of experience in optical systems, control systems, or adaptive optics, with demonstrated hands‑on implementation experience
Adaptive Optics (AO) experience demonstrated through prior hands‑on experience with:
- Development and tuning of adaptive optics closed‑loop control systems, including wavefront reconstruction and correction
- Practical experience with wavefront sensing technologies (e.g., Shack‑Hartmann or equivalent), including calibration, alignment, and noise characterization
- Design and implementation of real‑time AO control algorithms, with attention to latency, bandwidth, and stability
- Hands‑on integration and control of fast steering mirrors (FSMs) and slow steering mirrors (SSMs)
- Ability to model AO system performance end‑to‑end, including sensor noise, actuator dynamics, timing, and control‑law effects
- Experience validating AO performance through laboratory testing and in‑system commissioning, not simulation alone
- Strong understanding of beam quality, pointing error, jitter, and wavefront error budgeting
- Strong foundation in control theory, including classical and modern methods applied to real‑time physical systems
- Proficiency with algorithm development and analysis tools such as MATLAB/Simulink, Python, or equivalent numerical environments
- Hands-on experience integrating sensors and actuators into closed‑loop optical or electromechanical control systems
- Ability to work safely in laboratory and industrial environments involving high‑power lasers, high voltage, and precision equipment
- Must be a U.S. citizen or national, U.S. permanent resident (Green Card holder), or otherwise authorized to work in the United States

Desired

Experience with high‑energy or high‑average‑power laser adaptive optics, including thermal and dynamic beam distortions

Familiarity with advanced or predictive control techniques applied to AO systems (e.g., LQG, model‑based observers)

Implementation of AO or beam‑control algorithms on real‑time hardware platforms (FPGA, DSP, GPU, or similar)

Integration of AO systems with precision timing or TOF‑based synchronization systems

Experience with optical metrology and interferometric techniques for wavefront and beam characterization

Participation in AO‑related design reviews, test readiness reviews, or commissioning campaigns

Exposure to operation in demanding environments such as vacuum systems, vibration, thermal gradients, or high‑power laser facilities

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Electrical Engineer — Signal Distribution & Controls Packaging

Xcimer · Denver, CO

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Hardware / Electrical Denver, CO Posted Apr 16, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As an Electrical Engineer — Signal Distribution & Controls Packaging, you will apply your skills to own and deliver end‑to‑end electrical system implementation, including low voltage power distribution and protection, control panels and cabinets, harnessing, and electrical process and interface diagrams (P&IDs). We are looking for engineers who bring strong technical depth, systems thinking, and a commitment to quality to help build the electrical foundation of next‑generation fusion systems.

Responsibilities

Own electrical architecture and implementation for assigned subsystems, translating system and control requirements into safe, compliant electrical designs.
Design and own signal distribution and protection schemes, including grounding, shielding, fault protection, and electrical safety considerations.
Lead the design of control panels, cabinets, and electrical packaging, with a focus on robustness, serviceability, and scalability.
Own cable and harness architecture, including interface definition, routing strategy, and documentation.
Develop and maintain electrical‑focused P&IDs and interface diagrams describing power, signal, interlock, and utility interfaces.
Use P&IDs as a cross‑disciplinary communication tool between Electrical, Controls, Mechanical, Safety, and Operations.
Ensure consistency between P&IDs, schematics, wiring diagrams, harness drawings, and control I/O definitions.
Produce complete, build‑ready electrical design packages, including P&IDs, schematics, wiring diagrams, harness drawings, ICDs, BOMs, and supporting documentation.
Support design reviews, hazard analyses, safety reviews, system integration, commissioning, and bring‑up activities.
Lead electrical failure analysis and root‑cause investigations, driving corrective actions and continuous improvement.
Design electrical systems, panels, harnesses, and documentation in accordance with applicable internal and industry standards, including IPC/WHMA‑A‑620, IPC‑A‑610, IPC‑J‑STD‑001, UL 508A, NFPA 70/79, and ANSI/ISA‑5.1 for P&IDs.

Qualifications

Education: Bachelor’s degree in Electrical Engineering or equivalent.

Experience: 5+ Years of Experience in Electrical Engineering.

Demonstrated experience owning electrical system design for complex hardware systems.

Strong background in power distribution, protection, grounding, and electrical safety.

Experience designing control panels, cabinets, and electrical packaging.

Experience creating and maintaining electrical P&IDs, process diagrams, or electrical interface diagrams for complex systems.

Familiarity with common offerings from large electrical distributors like Rockwell Automation, Siemens, ABB, and Beckhoff.

Ability to produce clear, build‑ready electrical documentation.

Familiarity with industry standards applicable to electrical systems, including cable and wire harness standards (IPC/WHMA‑A‑620), electrical panel standards (UL 508A, NFPA 70/79), and P&ID standards (ANSI/ISA‑5.1).

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.

Desired

Experience using P&IDs in safety reviews, commissioning, or operational documentation.

Hands‑on experience with harness and cable design.

Experience supporting system integration, commissioning, and failure analysis.

Background working closely with controls, mechanical, and systems engineering teams.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Lead Experimental Physicist

Xcimer · Denver, CO

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Research / Science Denver, CO Posted Apr 14, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As the Lead Experimental Physicist, you will be responsible for independently driving complex laser-based experiments from definition through execution and analysis. This role requires strong experimental physics judgment, deep interest in the underlying science, and the ability to quickly learn and master sophisticated systems. You will design experiments, develop/upgrade diagnostics, analyze and interpret data, and continuously identify opportunities to improve experimental performance. You will work closely with scientists, engineers, technicians, shot directors, and leadership, serving as the technical driver for assigned experimental programs.

We are looking for our scientists and engineers to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

Act as the primary experimental owner for assigned laser experiments

Rapidly learn and develop deep understanding of complex experimental platforms, including lasers, diagnostics, and supporting subsystems

Design and execute experiments involving lasers, spectroscopy, imaging, and time resolved measurements

Develop and apply appropriate diagnostics to understand system performance and debug experimental issues

Translate high level scientific objectives into detailed experimental designs and test plans

Review experimental results critically, identify limitations, and drive systematic improvements

Perform quantitative post processing and analysis of spectroscopy and imaging data

Modify, extend, and maintain data processing and analysis scripts

Produce clear technical reports, presentations, and publishable quality results

Interface with the scientific board and senior scientists to understand experimental priorities and required outcomes

Collaborate closely with technicians and engineers, providing technical direction, mentoring, and training

Troubleshoot nontrivial experimental, diagnostic, and system level issues

Work effectively across disciplines, including experimentalists, theorists, engineers, and technicians

Qualifications

PhD in Physics, Electrical Engineering, Applied Physics, or a closely related field, or equivalent experience

Strong hands-on experience with laser-based experiments

Solid understanding of optical and laser diagnostics

Demonstrated ability to independently drive complex experimental work

Experience debugging complex experimental systems and diagnosing root causes

Willingness to learn pulsed power concepts

Proficiency in data analysis and post processing

Strong written and verbal communication skills

High level of motivation, curiosity, and ownership mindset

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum

Desired

Familiarity with excimer lasers

Experience in laser gain dynamics

Experience with laser wavefront measurement

Experience with deformable mirrors

Experience with phase plates

Experience with gas kinetics

Experience with vacuum systems.

Experience operating and aligning pulsed laser systems

Experience producing scientific publications

Experience working in multidisciplinary research laser facilities, such as national labs

Experience with Matlab, Python, and LabVIEW.

Prior experience mentoring technicians or junior team members

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Senior CAD Administrator, Siemens NX

Xcimer · Denver, CO

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Uncategorized Denver, CO Posted Mar 9, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As a CAD Administrator, you will ensure Xcimer NX users are enabled to move quickly and with excellence. We are looking for an NX power user who can combine their deep mastery of NX with strong support and coaching skills to help Xcimer achieve the goal of delivering fusion power to the grid.

Responsibilities

Develop and maintain NX templates, material libraries, start parts, customer defaults, drafting standards, and environment variables

Establish and enforce NX modeling best practices, including the creation of Xcimer modeling guides/workflows, FAQs, and how-to guides

Provide NX troubleshooting support to 20+ NX users (modeling/drafting command questions, settings and configuration questions, metadata questions, BOM structure questions, and other general questions) · Regularly communicate updates to NX processes to engineering and manufacturing teams

Deliver training to NX users including regular internal user-group meetings and onboarding sessions for new users

Serve as the liaison between NX users and Siemens and/or VAR support teams when support escalations are required

Construct and maintain a reuse library of COTS items, hole/slot features, standard cutouts/interfaces, etc.

Administer NX seat counts and add-ins over time, including: Managing the number of NX seats with changes in user headcount, researching/advising and onboarding NX add-ins based on user needs, maintaining a relationship with a VAR, and assisting with engineering software budget planning

Qualifications

10+ years of hands-on NX experience in modeling parts and assemblies, and drafting drawings in accordance with ASME Y14.5

Expert level proficiency in NX modeling workflows: parametric solid modeling, surfacing, sheet metal, weldments, large assemblies, and master-modeling techniques

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum

Desired

Experience administering NX environments integrated with Teamcenter

In-depth understanding of many manufacturing methods and DFMA practices, including 3/4/5 axis CNC machining, turning with live tooling, various additive manufacturing processes, sheet metal forming, welding, etc.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Principal Manufacturing Development Engineer

Xcimer · Denver, CO

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Engineering Denver, CO Posted Mar 2, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As a Principal Manufacturing Development Engineer, you will be responsible for developing automated equipment and manufacturing processes that enable reliable, repeatable production at increasing volumes. You will take ownership of automated manufacturing projects from concept through deployment, working closely with mechanical, electrical, controls, manufacturing, quality, facilities, and systems engineering partners. This role requires a hands-on engineer who is comfortable moving between design, prototyping, implementation, and troubleshooting in a fast-moving development environment.

This position offers the opportunity to significantly influence manufacturing capability, throughput, and system reliability across multiple hardware platforms critical to fusion energy development.

Responsibilities

Develop Advanced Automated Manufacturing Equipment: Lead the design and implementation of automated manufacturing systems incorporating industrial robotics, motion systems, sensing, and vision technologies. Define system architectures that prioritize reliability, scalability, and maintainability.

Controls and System Integration: Support controls engineers, who will develop and integrate electrical and controls systems using industrial PLCs, standard communication protocols, and HMI platforms. Support data acquisition and performance monitoring to evaluate and improve system behavior. Work with controls engineers to integrate industrial robotic systems to improve consistency, precision, and production efficiency within automated manufacturing cells.

Mechanical Design and DFM Support: Design mechanical components and assemblies using 3D CAD and GD&T principles. Generate detailed fabrication drawings and provide design-for-manufacturing feedback to improve automation performance and robustness.

Risk and Failure Analysis: Conduct product and process failure analyses, including DFMEA and PFMEA, to identify risks, implement mitigations, and support high system uptime.

Project and Program Ownership: Plan and execute multiple projects simultaneously by setting milestones, tracking progress, managing risks, and coordinating cross-functional resources. Support the development of internal processes that enable predictable delivery.

Manufacturing Process Optimization: Evaluate and improve automated manufacturing workflows by analyzing cycle times, material flow, automation ROI, and work-in-process buffering to support consistent production output.

Technical Documentation and Handover: Create comprehensive documentation including electrical and pneumatic schematics, bills of materials, maintenance documentation, spare parts lists, and troubleshooting guides to support long-term operation.

Safety and Regulatory Compliance: Collaborate with EHS stakeholders to perform risk assessments, define personal safety requirements, and integrate appropriate guarding.

Supplier and Integrator Management: Work with procurement and external vendors to develop RFQs, define technical specifications, manage build and installation phases, and lead factory and site acceptance testing for robots, cobots, palletizers, and other actuated parts of the production line. Support and coordinate with controls engineers who will own controls hardware definition and procurement.

Qualifications

Education: Bachelor’s or Master’s degree in Mechanical Engineering, Electrical Engineering, Robotics Engineering, or equivalent practical experience

Experience: 7+ years of experience in production line development

Demonstrated experience integrating industrial robotic systems

Strong mechanical design capability using SolidWorks, including GD&T and drawing release for automated equipment

Experience delivering manufacturing robotics or capital equipment projects from concept through commissioning, with proficiency using tools such as Jira or equivalent project tracking systems

Background in manufacturing optimization using Lean principles, Six Sigma tools, and structured problem-solving methodologies

Experience integrating machine vision systems, sensors, and closed-loop feedback for precision automation

Clear written and verbal communication skills, with the ability to develop technical specifications and collaborate effectively across disciplines

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Benefits Employee Benefits include: Medical, dental, vision, basic and supplemental life insurance, paid parental leave (must be employed at time of birth or adoption), short and long-term disability, 401(k) with a company match of up to 6%. Paid Time Off: 15 days per year based on weekly scheduled hours, 10 paid sick leave, and 13 company-paid holidays for all regular employees (including part-time), fixed-term, and interns. Equity will be granted to eligible employees. Equity is designed to allow employees to share in company results and success.

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Laser Scientist

Xcimer · Denver, CO

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Research / Science Denver, CO Posted Feb 23, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As a Laser Scientist, you will apply your skills and creativity to develop high-energy excimer lasers! You will work alongside the Theory & Computation, Laser Architecture, and Engineering teams to optimize the designs of laser oscillators and amplifiers to meet our unique performance needs. We are looking for our scientists and engineers to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

Quickly come up to speed on excimer laser modeling (chemical/plasma kinetics, optical amplification, electron beam pumping, etc.)

Improve kinetics models and develop new models based on experimental results and digging into past literature

Utilize and improve existing laser oscillator and amplifier simulation tools (Python, MATLAB)

Incorporate input from stakeholders to design new electron-beam-pumped excimer laser oscillators and amplifiers in collaboration with other disciplines

Contribute to our internal suite of simulation tools and knowledge base with clear documentation

Think outside the box to identify and solve unique challenges involving big lasers!

Qualifications

Education: Master’s degree in physics, optics, electrical engineering, chemistry, or related field

Experience: 6+ years of experience in the fields of optical physics and lasers

Expertise in laser physics (rate equations, gain dynamics, optical propagation, etc.)

Scientific computing proficiency using Python (preferred), MATLAB, C++, etc.

Strong foundation of optical physics and experience modeling non-Gaussian beam propagation

Demonstrated ability to successfully design laser systems

Experience working with a multidisciplinary team of engineers and scientists

Excellent verbal and written communication, including documentation of technical results

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum

Desired

Ph.D. in physics, optics, electrical engineering, chemistry, or related field

8+ years of experience in the fields of optical physics and lasers

Demonstrated ability to design high-intensity and/or high-complexity lasers

Hands-on experience building or using high-intensity/high-energy lasers, excimer lasers, or other gas lasers

Experience modeling excimer lasers, other gas lasers, chemical/plasma kinetics, or amplified spontaneous emission

Laser oscillator expertise, including mode competition, unstable resonators, and injection seeding

Demonstrated successful collaboration on code with a team

Working knowledge of nonlinear optics

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Paralegal

Xcimer · Denver, CO

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Legal / Compliance Denver, CO Posted Jan 28, 2026

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As Paralegal, you will apply your skills to assist Xcimer employees and the legal department across many legal domains. We are looking for all our employees to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

Become a trusted partner by supporting and collaborating with various internal groups and departments to accomplish Xcimer’s near and long-term milestones and objectives.

Coordinate the flow of information among members of the legal department and other internal and external stakeholders.

Provide support across continuously varying company projects and legal matters, ensuring deliverables are on time and consistently of high quality.

Assist with review, drafting, and negotiation of various agreements and corporate documents.

Set up and manage file and document repositories, including calendars, data rooms, task lists, and compliance logs, ensuring information is organized, accessible, and current.

Manage standard document templates and workflows, including document collection, organization, execution, and version control.

Escalate issues and identify opportunities for and drive process improvements.

Proactively identify and mitigate risks to deadlines.

Adapt to evolving internal schedules and changes.

Qualifications

Associate degree in paralegal studies or a related field; Bachelor’s degree preferred.

5+ years of relevant experience working in a law firm and/or a corporate legal department.

Excellent organization skills and attention to detail.

Flexibility and affinity for collaborative assignments.

Ability to multi-task and work efficiently and independently in a fast-paced environment while managing concurrent deadlines.

Ability to communicate clearly (verbally and in writing) and effectively across all company levels.

Proficient in Microsoft Office applications such as Word, Excel, SharePoint and Power Point, as well as Zoom, Slack, and Box applications.

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum

Desired

Certification from an ABA approved paralegal studies program or an accredited institution.

Experience supporting a legal department and corporate teams operating across different locations and time zones.

Experience negotiating and managing various confidentiality/nondisclosure agreements.

Experience supporting multiple attorneys with different specializations and responsibilities.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Senior Teamcenter Administrator

Xcimer · Denver, CO

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Uncategorized Denver, CO Posted Dec 9, 2025

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As a Teamcenter Administrator, you will apply your skills to install, configure, and maintain Teamcenter to support Xcimer’s Engineering and Product Development Process. We are looking for Teamcenter professionals who will develop and maintain the Teamcenter environment that enables Xcimer to deliver fusion power to the grid and transform the future of global energy.

Responsibilities

Install, configure, and maintain Teamcenter multi-tier deployments across DEV, QA, and Production environments.

Configure and maintain Active Workspace, including UI elements, pages, tiles, search configurations, and workflows.

Develop and maintain the Teamcenter data model using BMIDE with guidance from engineering process stakeholders.

Use Deployment Center to create deployment packages and perform installs/updates.

Manage search/indexing, dispatcher services, and the overall health of Teamcenter applications through upgrades and changes.

Integrate and support NX CAD with Teamcenter, ensuring attribute mappings are stable through upgrades and changes.

Configure connections between Teamcenter and other lifecycle tools (Violet Labs, Boltline, Precoro, and others as necessary via custom APIs).

Provide ongoing Tier 2/3 support for Teamcenter users across engineering, operations, and supply chain.

Develop and deliver training sessions, quick reference guides, and onboarding materials for Teamcenter.

Ensure Teamcenter is intuitive, reliable, and accessible for all users.

Qualifications

Experience: 8+ years of hands-on experience as a Teamcenter Administrator

Hands-on Teamcenter administration experience: Installation, configuration, and upgrades. (Experience with version 2506 or other recent releases preferred).

Experience deploying Teamcenter services in a hybrid environment, utilizing both on-prem and virtual server infrastructure.

Practical experience with BMIDE for data model design and configuration.

Strong troubleshooting and user support skills.

Ability to collaborate effectively with others to ensure the PLM environment will meet organizational needs.

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), orlawfully admitted into the U.S. as a refugee of granted asylum

Desired

Experience with Microsoft SQL Server or equivalent.

Experience implementing and developing Teamcenter in startup or rapidly growing small/medium size companies.

Experience with digital data models and integrating Teamcenter with other systems using REST APIs and software development tools.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Senior ICF Experimental Physicist

Xcimer · Denver, CO

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Research / Science Denver, CO Posted Oct 20, 2025

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As an ICF Experimental Physicist, you will lead the design, execution, and interpretation of experiments central to Xcimer’s Vulcan fusion program which aims to demonstrate wall plug breakeven. This individual will translate the physics basis and risk retirement plan into executable experiments, own diagnostic requirements, and develop Vulcan test plans that validate facility and subsystem readiness for ignition physics.

As the first experimentalist in the program, this role bridges physics, engineering, and systems integration. This physicist will ensure that Vulcan’s design, diagnostics, and experimental capabilities align directly with the needs of the Fusion Pilot Plant physics basis. We are looking for our scientists to apply their leadership, technical expertise, curiosity, problem solving skills, and dedication to quality to positively impact the future of energy!

Success in This Role Looks Like

Physics-based, data-driven path to risk retirement established for all critical Vulcan physics risks.

Diagnostic and facility requirements fully traceable to physics needs.

Measurable experimental validation milestones integrated into the FPP roadmap.

External collaborations leveraged strategically, with internal capability and ownership growing over time.

Responsibilities

Experimental Execution & Test Plan Development

Develop Vulcan test plans, defining the sequence of experiments required to validate subsystems, diagnostics, and integrated facility performance

Translate program-level physics risks into measurable experimental objectives and milestones

Design, execute, and analyze experiments that provide data to retire specific risks identified in the physics basis (e.g., symmetry control, LPI mitigation, target survivability, hohlraum performance, etc).

Ensure experimental validation criteria are quantitative, data driven, and aligned with modeling results

Partner with theory and modeling teams to close the loop between simulation predictions and experimental validation.

Diagnostics & Measurement Systems

Write diagnostic requirements for Vulcan and precursor experiments.

Work with systems engineers to define line-of-sight, resolution, and temporal accuracy requirements consistent with physics metrics.

Coordinate with optical, target, and chamber teams to ensure diagnostic integration early in the facility design process.

Facility & Program Integration

Represent the experimental physics perspective in Vulcan facility planning, ensuring experimental capability maps onto the physics roadmap.

Interface with the Vulcan systems team, target factory, and injector groups to ensure data acquisition, repetition rate, and diagnostic access align with experimental needs.

Partner with target fab, chamber, and laser teams to ensure subsystem interfaces and tolerances meet experimental requirements.

Leadership & Collaboration

Build experimental partnerships with national labs and universities; serve as technical lead for collaborative shots and campaigns.

Mentor future hires in diagnostics, data systems, and experimental design.

Contribute to publications and presentations that establish Xcimer as a leader in inertial fusion experimentation.

Qualifications

Education: Ph.D. in Physics, or a related field, with specialization in inertial confinement fusion, HED physics, or laser-plasma interactions.

Demonstrated experience designing and executing experiments on major HED facilities (OMEGA, NIF, or equivalent).

Expertise in one or more diagnostic domains: x-ray imaging, neutron time-of-flight, charged particle spectrometry, VISAR, or optical backscatter.

Proven ability to define quantitative experimental success metrics and extract them from data.

Strong written and verbal communication skills; ability to synthesize results for executives, engineers, and external partners.

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum.

Desired

Experience leading multi-institutional experimental campaigns or managing external collaborators.

Familiarity with target fabrication, layering, and injection constraints.

Experience with system design trades between physics goals, diagnostics, and facility operations.

Understanding of ignition metrics and performance scaling

Prior participation in conceptual design reviews or DOE-style pre-conceptual design efforts.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

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Laser Physicist

Xcimer · Denver, CO

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Research / Science Denver, CO Posted Sep 22, 2025

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

As a Laser Physicist, you will apply your expertise to design, build, modify, and operate both new and existing pulsed laser systems. You will enhance and optimize these systems, such as improving laser beam quality, and work with vendors to procure necessary hardware devices needed for specific laser upgrades. Additionally, you will assist optics engineers with aligning complex laser beam paths, calibrating laser diagnostics equipment, identifying opportunities to improve current diagnostics, writing requirements, and working with vendors to develop state-of-the-art high-energy laser diagnostics. Part of your responsibilities will include maintaining laser systems, which involves realignment, diagnosing issues, and coordinating with vendors to resolve component malfunctions and quickly bring the system back online. You will also conduct spectroscopic experiments, collect and process data, and collaborate closely with experimentalists, theorists, optics engineers, and controls engineers to ensure the system runs reliably and supports experimental needs.

We are looking for our scientists and engineers to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

Design, modify, operate, and maintain advanced pulsed laser systems.

Enhance laser beam quality by specifying, sourcing, and installing optical components and hardware.

Select optical components based on laser damage thresholds, transmission, and beam quality requirements; collaborate with vendors to refine specifications and procure these optics.

Develop clear procedures and documentation for technicians, providing training on complex laser systems to enable basic maintenance and alignment tasks.

Plan, execute, and oversee spectroscopic experiments, ensuring accurate data collection and thorough analysis.

Calibrate laser characterization devices and ensure experimental data is acquired accurately and free of artifacts.

Collaborate closely with engineers, offering clear technical guidance to support the design and development of laser systems.

Qualifications

BS with 3+ years of experience, MS with 1-2 years of related lab experience, PhD desired.

Advanced knowledge in solid state and gas pulsed lasers and characterization of laser pulses.

Ability to own and maintain complex laser systems.

Experience in specifying, budgeting, purchasing, installing, and operating laser systems, detectors, optics, spectrometers, and other scientific research equipment.

Experience in nonlinear frequency conversion processes.

Independent troubleshooting and solving non-trivial technical issues.

Planning, managing, and executing laser-based experiments.

Experience working with a multidisciplinary team of engineers and scientists.

Highly self-motivated, with the ability to work independently without guidance.

Advanced verbal and written communication skills.

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum.

Desired

PhD in electrical engineering, chemistry, physics, or related fields.

Expertise in optical spectroscopy, gas kinetics, and data processing.

Experience in laser gain dynamics

Experience with electro-optical devices.

Experience in pulse shaping of laser pulses.

Experience in spectral shaping of laser pulses.

Hands-on experience with aligning Ti:Sapphire laser systems.

Familiarity with fiber optics.

Experience working with high-damage-threshold optics.

Knowledge of phase mask and/or free-form optic manufacturing, specification, and alignment.

Experience with ns and fs pulse diagnostics and characterization (spectral and temporal).

Experience with vacuum systems.

Experience leading teams of optical, laser, and controls engineers

Experience building laser beamlines

Experience working in multidisciplinary research laser facilities, such as national labs

Experience in writing scientific papers.

Experience in Matlab, Python, and LabVIEW.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Benefits Employee Benefits include: Medical, dental, vision, basic and supplemental life insurance, paid parental leave (must be employed at time of birth or adoption), short and long-term disability, 401(k) with a company match of up to 6%. Paid Time Off: 15 days per year based on weekly scheduled hours, 10 paid sick leave, and 13 company-paid holidays for all regular employees (including part-time), fixed-term, and interns. Equity will be granted to eligible employees. Equity is designed to allow employees to share in company results and success.

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General Application

Xcimer · Denver, CO

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Uncategorized Denver, CO Posted Oct 12, 2023

Are you interested in joining Xcimer Energy, but dont see the perfect fit? No problem.

We are always looking for great engineers, scientists, technicians and overall amazing people to help us deliver clean, abundant and safe energy to the grid with laser driven inertial fusion. If you love tackling challenging problems from start to finish, then we want to hear from you!

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

We are looking for talented engineers, scientists, and technicians to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Qualifications:

Passion for solving complex problems and contributing to positively impacting the future of energy!

Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum.

Equal Employment Opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. Eligible employees also receive equity, allowing them to share in the company’s long-term success.

Xcimer operates under a flexible Paid Time Off (ATO) approach. Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

Ready to apply?

Apply to Xcimer

Xcimer

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