Pacific Fusion
Pick a job to read the details
Tap any role on the left — its description and apply link will open here.
Senior Mechanical Engineer - Vacuum Systems
Share this job
About Pacific Fusion
Pacific Fusion was founded in 2023 with the mission to power the world with abundant, affordable, clean energy.
We are rapidly designing and building a pulser-driven inertial fusion system to achieve net facility gain (more fusion energy output than stored energy input). In parallel, we are developing the key components required to build affordable fusion systems.
Our plans are ambitious. We have raised over $900M so far from incredible investors, resourcing us to deliver on these plans. We are bringing together the best scientists, engineers, and operators from the fusion community, hard tech industry, and other sectors. We are united by a shared sense of urgency to provide clean power for the world, particularly managing climate change while meeting growing global energy demand. You can read more about us in this letter from our founders.
Why This Role Matters
As a Senior Mechanical Engineer, you will lead the design, development, and integration of complex vacuum seal systems for our pulsed magnetic inertial fusion platform. This role focuses on designing robust seals for high-vacuum, air, and water interfaces exposed to extreme fusion conditions.
Responsibilities:
-
Design and analyze large, high-performance vacuum seals for water-to-air, air-to-high-vacuum, and water-to-high-vacuum transitions
-
Lead experimental design and testing of vacuum seals in collaboration with internal teams, external vendors, and academic partners
-
Conduct research into novel sealing techniques; define, execute, and evaluate test campaigns
-
Perform FMEA and tolerance stack-up analyses to ensure seal reliability and system safety
-
Design test assemblies for seal validation and risk-reduction
-
Review and present technical work across multidisciplinary teams; contribute to system-level integration discussions
-
Provide subject-matter expertise in sealing strategies and guide the integration of vacuum seals into the fusion target area
-
Document sealing processes, validation data, and lessons learned
-
Mentor and support junior engineers on vacuum system design and integration challenges
Qualifications:
-
Bachelor's or Master's degree in Mechanical, Aerospace, or a related engineering field, or equivalent experience
-
8+ years of mechanical design experience with a focus on vacuum seals and systems, including rough, high, and ultra-high vacuum environments
-
Strong proficiency in CAD, FEM, and engineering analysis tools
-
Proven expertise in tolerance analysis, FMEA, seal design, and mechanical integration
Total Compensation & Benefits for Eligible Employees
-
Industry-competitive salary
-
Equity plan
-
6% employer 401k matching
-
Generous paid time off (including sick leave, vacation, paid family leave)
-
Medical, Dental, and Vision insurance
Actual base salary offered will be determined by: experience, skills, and work location. This range is for base salary, our total compensation includes equity and benefits. We welcome you to apply even if your expectations are outside our listed range.
Pacific Fusion is committed to creating a diverse environment and is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.
Pacific Fusion is committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures and throughout employment. If you need assistance or any accommodation, please let us know.
Pacific Fusion does not accept unsolicited resumes from recruiters or employment agencies without a fully executed recruitment agreement in place. In the absence of such agreement, Pacific Fusion reserves the right to pursue and hire any candidates without an obligation to pay fees. Agencies are requested not to contact Pacific Fusion hiring managers or employees regarding recruiting services.
Ready to apply?
Apply to Pacific Fusion
Senior Mechanical Design Specialist
Share this job
About Pacific Fusion
Pacific Fusion was founded in 2023 with the mission to power the world with abundant, affordable, clean energy.
We are rapidly designing and building a pulser-driven inertial fusion system to achieve net facility gain (more fusion energy output than stored energy input). In parallel, we are developing the key components required to build affordable fusion systems.
Our plans are ambitious. We have raised over $900M so far from incredible investors, resourcing us to deliver on these plans. We are bringing together the best scientists, engineers, and operators from the fusion community, hard tech industry, and other sectors. We are united by a shared sense of urgency to provide clean power for the world, particularly managing climate change while meeting growing global energy demand. You can read more about us in this letter from our founders.
Why This Role Matters
Pacific Fusion is seeking multiple Senior Mechanical Design Specialist's to support the development of advanced mechanical systems for next-generation fusion energy technology. This role is ideal for creative, hands-on mechanical designers with strong CAD expertise who can work independently while collaborating closely with scientists, engineers, and cross-functional technical teams.
Successful candidates will develop and analyze complex mechanical systems, conduct research to resolve challenging engineering problems, and translate concepts into fully detailed, production-ready designs. Depending on experience and qualifications, candidates may also provide technical leadership, including planning and leading multiple complex projects
What You'll Do
- Independently analyze complex design problems and develop robust mechanical design solutions that satisfy all requirements and constraints.
- Translate design solutions into detailed layouts and assemblies using Creo Parametric
- Develop supporting documentation for design solutions, including analysis, schedules, cost estimates, and procedures.
- Capture design intent using Creo Parametric, including model-based definition practices where applicable.
- Maintain accurate design documentation and configuration control within Windchill or equivalent PLM/ELM systems.
- Estimate schedules and costs to determine effective approaches for design, materials selection, and fabrication to meet project deliverables.
- Prepare and present technical material for design reviews, procedures, and related documentation.
- Provide technical mentorship to fellow designers and contribute to workforce planning, task prioritization, and work assignments.
- Participate in formal design reviews and engineering change processes.
- Author, review, and approve engineering reports, manuals, and other technical documentation.
- Present designs and technical analyses to engineering leadership and project stakeholders
What You Bring
- Associate's degree in Mechanical Design, Mechanical Mechanical Design Technology, or a related technical field, or an equivalent combination of education and relevant experience.
- Significant applied experience with Creo Parametric and Windchill (or equivalent CAD/PLM systems).
- Advanced knowledge of CAD/PLM systems and configuration management best practices.
- Strong working knowledge of drafting standards, including ASME Y14.5 Geometric Dimensioning and Tolerancing (GD&T).
- Demonstrated ability to analyze and interpret complex design requirements and develop original, practical engineering solutions.
- Experience with hardware design, fabrication, assembly techniques, material selection, testing processes, and manufacturing methods.
- Ability to read, interpret, and follow complex engineering drawings, specifications, sketches, and procedures.
- Proven ability to manage multiple tasks with attention to detail, accuracy, and independent follow-through.
- Strong written and verbal communication skills, including the ability to present technical information clearly.
Bonus Points For
- Demonstrated technical or project leadership experience.
- Experience developing staffing plans, safety notes, mentoring engineers or designers, and contributing to performance development.
- Familiarity with project management methods and tools.
- Experience using CAD-supported Finite Element Analysis (FEA) to support conceptual and detailed design decisions.
Total Compensation & Benefits for Eligible Employees
-
Industry-competitive salary
-
Equity plan
-
6% employer 401k matching
-
Generous paid time off (including sick leave, vacation, paid family leave)
-
Medical, Dental, and Vision insurance
Actual base salary offered will be determined by: experience, skills, and work location. This range is for base salary, our total compensation includes equity and benefits. We welcome you to apply even if your expectations are outside our listed range.
Pacific Fusion is committed to creating a diverse environment and is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.
Pacific Fusion is committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures and throughout employment. If you need assistance or any accommodation, please let us know.
Pacific Fusion does not accept unsolicited resumes from recruiters or employment agencies without a fully executed recruitment agreement in place. In the absence of such agreement, Pacific Fusion reserves the right to pursue and hire any candidates without an obligation to pay fees. Agencies are requested not to contact Pacific Fusion hiring managers or employees regarding recruiting services.
Ready to apply?
Apply to Pacific Fusion
Senior Mechanical Design Engineer - Positioning Systems
Share this job
About Pacific Fusion
Pacific Fusion was founded in 2023 with the mission to power the world with abundant, affordable, clean energy.
We are rapidly designing and building a pulser-driven inertial fusion system to achieve net facility gain (more fusion energy output than stored energy input). In parallel, we are developing the key components required to build affordable fusion systems.
Our plans are ambitious. We have raised over $900M so far from incredible investors, resourcing us to deliver on these plans. We are bringing together the best scientists, engineers, and operators from the fusion community, hard tech industry, and other sectors. We are united by a shared sense of urgency to provide clean power for the world, particularly managing climate change while meeting growing global energy demand. You can read more about us in this letter from our founders.
Why This Role Matters
Pacific Fusion is seeking an exceptional Senior Mechanical Design Engineer to join our dynamic team and create the path to commercial fusion energy. You will lead the design, development, and validation of mechanical components and positioning systems integral to our advanced fusion energy systems. This role requires a top-tier combination of technical expertise, problem-solving skills, and a proactive mindset to meet the exciting challenges in the field of fusion energy. As a Senior Mechanical Design Engineer, you will lead collaborative and challenging projects and play a vital role in driving the overall development effort.
What You'll Do
- Drive and develop innovative mechanical designs for complex, multi-degree of freedom positioning systems while adhering to ambitious timelines.
- Lead the implementation of design changes and improvements across positioning systems.
- Work closely with vendors and manufacturers to ensure designs are practical, cost-effective, and manufacturable.
- Provide mechanical analysis on various systems.
- Conduct design reviews and provide critical feedback to improve system performance and reliability.
- Coordinate with multidisciplinary teams (including electrical, software, and manufacturing engineers) to integrate system-level designs.
- Rapidly iterate on designs and prototypes developing integrated test beds as required.
- Oversee the creation of detailed design documentation and specifications.
- Participate in risk assessments and develop mitigation strategies.
What You Bring
- A Bachelor’s Degree in Mechanical Engineering is required. A Master’s Degree or PhD is a plus.
- 10+ years work experience as a Mechanical Design Engineer.
- Advanced knowledge of CAD software - Creo being preferred - with extensive experience in GD&T.
- Experience in the application of mechanical engineering analysis including Finite Element Analysis (FEA).
- Proven track record of successfully designing, developing and building multi-degree of freedom, precision systems.
- Extensive knowledge of material properties and their impact on precision engineering.
- Excellent leadership skills, with the ability to mentor and guide junior engineers.
- Strong understanding of manufacturing processes and DFM (Design for Manufacturability).
- Excellent problem-solving skills, with a strong attention to detail.
- Experience in hands-on engineering design, rapid iteration, and creative problem solving in a laboratory setting.
Total Compensation & Benefits for Eligible Employees
-
Industry-competitive salary
-
Equity plan
-
6% employer 401k matching
-
Generous paid time off (including sick leave, vacation, paid family leave)
-
Medical, Dental, and Vision insurance
Actual base salary offered will be determined by: experience, skills, and work location. This range is for base salary, our total compensation includes equity and benefits. We welcome you to apply even if your expectations are outside our listed range.
Pacific Fusion is committed to creating a diverse environment and is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.
Pacific Fusion is committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures and throughout employment. If you need assistance or any accommodation, please let us know.
Pacific Fusion does not accept unsolicited resumes from recruiters or employment agencies without a fully executed recruitment agreement in place. In the absence of such agreement, Pacific Fusion reserves the right to pursue and hire any candidates without an obligation to pay fees. Agencies are requested not to contact Pacific Fusion hiring managers or employees regarding recruiting services.
Ready to apply?
Apply to Pacific Fusion
Senior Mechanical Engineer
Share this job
About Pacific Fusion
Pacific Fusion was founded in 2023 with the mission to power the world with abundant, affordable, clean energy.
We are rapidly designing and building a pulser-driven inertial fusion system to achieve net facility gain (more fusion energy output than stored energy input). In parallel, we are developing the key components required to build affordable fusion systems.
Our plans are ambitious. We have raised over $900M so far from incredible investors, resourcing us to deliver on these plans. We are bringing together the best scientists, engineers, and operators from the fusion community, hard tech industry, and other sectors. We are united by a shared sense of urgency to provide clean power for the world, particularly managing climate change while meeting growing global energy demand. You can read more about us in this letter from our founders.
Why This Role Matters
Pacific Fusion is seeking an exceptional Senior Mechanical Engineer to join our dynamic team and create the path to commercial fusion energy. You will lead the design, development, and validation of mechanical components and systems integral to our advanced fusion energy systems. This role requires a top-tier combination of technical expertise, problem-solving skills, and a proactive mindset to meet the exciting challenges in the field of fusion energy. As a Senior Mechanical Engineer, you will lead collaborative and challenging projects and play a vital role in driving the overall development effort.
What You'll Do
-
Develop innovative mechanical designs for complex engineering problems while adhering to ambitious timelines.
-
Lead the implementation of design changes and improvements across our systems.
-
Work closely with vendors and manufacturers to ensure designs are practical, cost-effective, and manufacturable.
-
Provide structural mechanical analysis on various systems.
-
Conduct design reviews and provide critical feedback to improve system performance and reliability.
-
Coordinate with multidisciplinary teams (including electrical, software, and manufacturing engineers) to integrate system-level designs.
-
Oversee the creation of detailed design documentation and specifications.
-
Stay current with industry trends and advancements in mechanical design and manufacturing technologies.
-
Participate in risk assessments and develop mitigation strategies.
What You Bring
-
Bachelor’s Degree in Mechanical Engineering required. A Master’s Degree or PhD is a plus.
-
6+ years work experience as a Mechanical Engineer
-
Advanced knowledge of CAD software, Creo being preferred
-
Experience in the application of Finite Element Analysis (FEA) and/or Computational Fluid Dynamics (CFD).
-
Proven track record of developing and launching successful mechanical designs.
-
Excellent leadership skills, with the ability to mentor and guide junior engineers.
-
Strong understanding of manufacturing processes and DFM (Design for Manufacturability).
-
Excellent problem-solving skills, with a strong attention to detail.
-
Experience in hands-on engineering design, rapid iteration, and creative problem solving in a laboratory setting.
-
Excellent written and verbal communication skills.
Total Compensation & Benefits for Eligible Employees
-
Industry-competitive salary
-
Equity plan
-
6% employer 401k matching
-
Generous paid time off (including sick leave, vacation, paid family leave)
-
Medical, Dental, and Vision insurance
Actual base salary offered will be determined by: experience, skills, and work location. This range is for base salary, our total compensation includes equity and benefits. We welcome you to apply even if your expectations are outside our listed range.
Pacific Fusion is committed to creating a diverse environment and is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.
Pacific Fusion is committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures and throughout employment. If you need assistance or any accommodation, please let us know.
Pacific Fusion does not accept unsolicited resumes from recruiters or employment agencies without a fully executed recruitment agreement in place. In the absence of such agreement, Pacific Fusion reserves the right to pursue and hire any candidates without an obligation to pay fees. Agencies are requested not to contact Pacific Fusion hiring managers or employees regarding recruiting services.
Ready to apply?
Apply to Pacific Fusion