Arbor Energy
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Sr. Heat Exchanger Engineer
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About Us
At Arbor Energy & Resources Corporation ("Arbor Energy"), we’re creating technology to power our lives while protecting the planet that sustains them. Our advanced power systems deliver clean, reliable baseload electricity with zero operating emissions—modular, fuel-flexible, and engineered for the realities of today’s energy demand. At the core is a supercritical CO₂ turbine with integrated carbon capture, designed to bring carbon-neutral power online quickly at meaningful scale.
Our team includes aerospace engineers, combustion experts, and systems thinkers with a shared goal: to build technology worthy of the world we want to live in. While many of us began our journeys looking to the stars, we’re applying that expertise here at home to deliver dependable, emission-free baseload power and a future of lasting abundance.
If you share our values and are drawn to rigorous work with lasting impact, we’d love to learn more about you. Come build what the future will run on.
Steward our planet: We build for tomorrow, ensuring every bolt we tighten and every hand we lend leaves our environment stronger than we found it.
Lead with Love: We champion the success of our people, partners, and planet, nurturing excellence through camaraderie and rigor.
Explore the Uncharted: We embrace the unknown with curiosity, using courage and discipline to transform uncertainty into opportunity.
Role Overview
We’re looking for a Sr. Heat Exchanger Engineer to own the design, specification, and development of heat exchangers across Arbor’s supercritical CO₂ power system. You’ll span the full range—from specifying and technically managing third-party shell-and-tube coolers and air coolers, to leading in-house detailed design of advanced compact heat exchangers in high-temperature nickel superalloys. You’ll work closely with thermodynamic cycle analysts, mechanical systems engineers, and test engineers in a fast-paced, hands-on R&D environment. This is a rare opportunity to apply deep thermal-fluids and manufacturing expertise to climate-impactful technology at the frontier of power generation.
Responsibilities
- Own the thermal-hydraulic design of all heat exchangers in the Arbor power system—recuperators, precoolers, primary heat exchangers, and water and air coolers—from conceptual sizing through detailed design, balancing performance, pressure drop, and cost.
- Lead in-house design and development of advanced compact heat exchangers, including printed circuit heat exchangers (PCHEs) and components produced by additive manufacturing (AM) in materials such as 316SS, Inconel 625, and Haynes 282; apply design for additive manufacturing (DfAM) principles to translate geometric freedom into manufacturable, high-performing hardware.
- Specify, procure, and technically manage third-party heat exchangers—including shell-and-tube coolers, fin-fan air coolers, and advanced compact units—from thermal datasheet through vendor drawing review and factory acceptance testing.
- Collaborate with a dedicated pressure vessel engineer on mechanical design under ASME, TEMA, and API 661; maintain working familiarity with applicable codes to make sound design decisions and effectively review deliverables.
- Plan and execute thermal and hydraulic performance testing during development campaigns: define instrumentation requirements, write test procedures, lead data reduction, and anchor analytical models to test data.
- Collaborate closely with thermodynamic cycle analysts, mechanical systems engineers, and test engineers to translate cycle-level requirements into hardware specifications and integrate heat exchangers into the broader power system.
- Champion design for manufacturability and scalability across in-house heat exchanger development programs, bridging detailed design and production to bring novel hardware from concept to reality.
- Generate and maintain the full engineering documentation package: thermal and mechanical calculation packages, drawings, material and process specifications, and test reports.
Requirements
- Bachelor’s degree in Mechanical, Chemical, Aerospace, or related Engineering field.
- 10+ years of experience in heat exchanger design and development, spanning thermal-hydraulic analysis, mechanical design, and hardware validation.
- Demonstrated experience designing advanced compact heat exchangers—PCHEs, plate-fin, microchannel, or similar—including selection and optimization of channel geometry for performance, pressure drop, and manufacturability.
- Experience specifying and technically managing conventional heat exchangers (shell-and-tube, air-cooled) per TEMA and API 661 standards.
- Working familiarity with ASME Boiler and Pressure Vessel Code and its application to heat exchanger mechanical design.
- Proficiency in industry thermal design tools (HTRI or equivalent) and scripting or computation for custom analyses (Python, MATLAB, or similar).
- Proven track record of taking heat exchanger hardware from design through fabrication and performance validation in a hands-on engineering environment.
- Strong ownership mentality with the ability to drive technical programs independently in a small, fast-paced startup environment.
Preferred Qualifications
- Experience with supercritical CO₂ or other supercritical or dense-phase working fluids.
- Background in metal additive manufacturing (laser powder bed fusion, binder jetting, or directed energy deposition) applied to heat exchanger or thermal device design and qualification.
- Experience bridging detailed design and production—developing or scaling manufacturing processes for novel hardware, not just specifying for outside vendors.
- Background in startup, R&D, or first-of-a-kind hardware development environments.
Compensation & Benefits
- Pre-IPO stock options
- Medical, dental, and vision insurance (Arbor covers 90% for employees)
- Basic life insurance fully covered
- Health savings account (HSA) with matching
- Flexible savings account (FSA)
- Unlimited PTO
- 12+ company holidays, including Earth Day!
- 401(k)
- Commuter benefits
- Annual learning and development stipend
- And more!
Base Pay: $165,000 - $180,000 USD/year. The salary is subject to the applicant's skills, qualifications, experience, and geographic location.
Our Commitment
Arbor Energy is proud to be an equal opportunity employer. We evaluate qualified applicants without regard to race, religion, national origin, gender identity or expression, sexual orientation, age, marital or veteran status, disability, or any other protected characteristic under applicable law. Solving global energy challenges requires a wide range of perspectives and experiences, and we are committed to building a team that reflects the world we serve.
Our hiring process is designed to be accessible, fair, and focused on the work that matters most for this role. Reasonable accommodations are available throughout the hiring process and employment—please let us know if you need one.
Ready to apply?
Apply to Arbor Energy
Cycle Performance Engineer
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About Us
At Arbor Energy & Resources Corporation ("Arbor Energy"), we’re creating technology to power our lives while protecting the planet that sustains them. Our advanced power systems deliver clean, reliable baseload electricity with zero operating emissions—modular, fuel-flexible, and engineered for the realities of today’s energy demand. At the core is a supercritical CO₂ turbine with integrated carbon capture, designed to bring carbon-neutral power online quickly at meaningful scale.
Our team includes aerospace engineers, combustion experts, and systems thinkers with a shared goal: to build technology worthy of the world we want to live in. While many of us began our journeys looking to the stars, we’re applying that expertise here at home to deliver dependable, emission-free baseload power and a future of lasting abundance.
If you share our values and are drawn to rigorous work with lasting impact, we’d love to learn more about you. Come build what the future will run on.
Steward our planet: We build for tomorrow, ensuring every bolt we tighten and every hand we lend leaves our environment stronger than we found it.
Lead with Love: We champion the success of our people, partners, and planet, nurturing excellence through camaraderie and rigor.
Explore the Uncharted: We embrace the unknown with curiosity, using courage and discipline to transform uncertainty into opportunity.
Role Overview
We are seeking a Cycle Performance Engineer to own the thermodynamic model of our direct-fired supercritical CO₂ Brayton cycle power loop — connecting design intent to real-world test results. In this role, you will plan and execute performance analysis campaigns, predict system response ahead of testing, and reconcile model output against test data to sharpen our understanding of first-of-a-kind technology. You will work closely with test engineers, combustion engineers, turbomachinery engineers, and our recuperator and fluid systems teams, translating integrated system behavior into clear, actionable technical insight. This is hands-on, high-stakes engineering work on climate-impactful technology at the frontier of what's possible in clean power.
Responsibilities
- Own the integrated heat and mass balance model for Arbor's power loop, maintaining and improving it as system design and operating experience evolve
- Run steady-state and transient/dynamic simulation cases to predict system-level performance ahead of test campaigns — including sensitivity studies that answer "what happens to the loop if we change X?"
- Analyze test data and systematically reconcile differences between measured and predicted performance, driving model refinement and surfacing component-level insights for disciplinary engineers
- Support test planning by providing pre-test performance predictions, identifying operating envelope constraints, and flagging potential interactions across the integrated system
- Critically evaluate commercial process simulation tools (e.g., Aspen HYSYS, Pro/II, Symmetry) for fitness to the sCO₂ recuperated Brayton cycle use case, and lead implementation of scripted alternatives (Python, MATLAB/Simulink) when commercial tools fall short
- Collaborate with combustion, turbomachinery, and heat exchanger engineers to integrate component-level performance data and curves into system-level models
- Participate in process hazard analyses (PHA/HAZOP), control narrative reviews, and operating procedure development as projects progress through the hardware lifecycle
Requirements
- Bachelor's degree in Chemical, Mechanical, Aerospace, or related Engineering field
- 6+ years of experience in process engineering, cycle performance analysis, thermodynamic systems design, or closely related discipline
- Strong fundamentals in thermodynamics, fluid mechanics, and heat transfer, with demonstrated ability to apply them to integrated multi-component system analysis
- Experience critically evaluating commercial process simulation tools (Aspen HYSYS, Pro/II, Symmetry, or equivalent) and building custom models in Python, MATLAB, or similar when commercial tools fall short; comfort with both steady-state and dynamic simulation
- Working knowledge of the process equipment that makes up an integrated power loop — heat exchanger sizing and rating (Q = UA·LMTD), compressor and pump curves, control valve Cv, pressure relief, and piping hydraulics
- Ability to manage competing priorities, communicate complex technical findings clearly across disciplines, and proactively seek direction when operating with loose guidance
- Strong ownership mentality and comfort driving rigorous analysis in a fast-paced, startup environment
Preferred Qualifications
- Experience with supercritical CO₂, closed Brayton cycles, high-pressure systems (100+ bar), or other high-density working fluids
- Hands-on plant startup, commissioning, or field troubleshooting experience — particularly on developmental or first-of-a-kind systems
- Background in rocketry, gas turbine, or high-performance turbomachinery environments
- Programming or scripting proficiency for simulation, data reduction, and automation (Python, MATLAB/Simulink)
- Experience in a startup or agile R&D environment
Compensation & Benefits
- Pre-IPO stock options
- Medical, dental, and vision insurance (Arbor covers 90% for employees)
- Basic life insurance fully covered
- Health savings account (HSA) with matching
- Flexible savings account (FSA)
- Unlimited PTO
- 12+ company holidays, including Earth Day!
- 401(k)
- Commuter benefits
- Annual learning and development stipend
- And more!
Base Pay: $140,000 - $155,000 USD/year. The salary is subject to the applicant's skills, qualifications, experience, and geographic location.
Our Commitment
Arbor Energy is proud to be an equal opportunity employer. We evaluate qualified applicants without regard to race, religion, national origin, gender identity or expression, sexual orientation, age, marital or veteran status, disability, or any other protected characteristic under applicable law. Solving global energy challenges requires a wide range of perspectives and experiences, and we are committed to building a team that reflects the world we serve.
Our hiring process is designed to be accessible, fair, and focused on the work that matters most for this role. Reasonable accommodations are available throughout the hiring process and employment—please let us know if you need one.
Ready to apply?
Apply to Arbor Energy
Test Engineer (High-Pressure Gas Systems)
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About Us
At Arbor Energy & Resources Corporation ("Arbor Energy"), we’re creating technology to power our lives while protecting the planet that sustains them. Our advanced power systems deliver clean, reliable baseload electricity with zero operating emissions—modular, fuel-flexible, and engineered for the realities of today’s energy demand. At the core is a supercritical CO₂ turbine with integrated carbon capture, designed to bring carbon-neutral power online quickly at meaningful scale.
Our team includes aerospace engineers, combustion experts, and systems thinkers with a shared goal: to build technology worthy of the world we want to live in. While many of us began our journeys looking to the stars, we’re applying that expertise here at home to deliver dependable, emission-free baseload power and a future of lasting abundance.
If you share our values and are drawn to rigorous work with lasting impact, we’d love to learn more about you. Come build what the future will run on.
Steward our planet: We build for tomorrow, ensuring every bolt we tighten and every hand we lend leaves our environment stronger than we found it.
Lead with Love: We champion the success of our people, partners, and planet, nurturing excellence through camaraderie and rigor.
Explore the Uncharted: We embrace the unknown with curiosity, using courage and discipline to transform uncertainty into opportunity.
Role Overview
We are seeking a Test Engineer to develop, execute, and oversee testing procedures and test stand hardware to test complex fluid, mechanical and electrical systems. This role involves designing test plans, analyzing performance data, building and troubleshooting test stand fluids and instrumentation systems, and ensuring compliance with safety and quality standards. The ideal candidate has experience in test automation, data acquisition, and working with high-energy or hazardous systems. This position requires on-site work with up to 40% travel to local test facilities.
Responsibilities
- Collaborate with design engineers to develop and implement test plans for fluid, electrical, and control systems.
- Oversee test execution, analyze data, and troubleshoot system performance issues.
- Design and maintain test fluid systems, fixtures, and instrumentation.
- Ensure compliance with safety regulations and industry standards.
- Develop and maintain procedures for test site operation and management.
Requirements
- Bachelor’s degree in Mechanical, Electrical, Aerospace, or a related engineering field.
- 3+ years of experience in system testing, validation, or a related field.
- Experience with high-pressure gas systems.
- Strong troubleshooting and problem-solving skills.
- Familiarity with test instrumentation and sensor integration.
- Proficiency in analyzing test data and generating reports.
Preferred Qualifications
- Experience testing high-energy or hazardous systems (high voltage, high pressure, etc.).
- Experience with data acquisition and test automation systems.
- Knowledge of LabVIEW, Python, MATLAB, or similar for test automation.
- Experience working with PLCs, control systems, and industrial sensors.
- Familiarity with industry standards such as API, ASME, IEEE, or MIL-STD.
- Experience in a fast-paced startup or R&D environment.
Compensation & Benefits
- Pre-IPO stock options
- Medical, dental, and vision insurance (Arbor covers 90% for employees)
- Basic life insurance fully covered
- Health savings account (HSA) with matching
- Flexible savings account (FSA)
- Unlimited PTO
- 12+ company holidays, including Earth Day!
- 401(k)
- Commuter benefits
- Annual learning and development stipend
- And more!
Base Pay: $130,000 - $150,000 USD/year. The salary is subject to the applicant's skills, qualifications, experience, and geographic location.
Our Commitment
Arbor Energy is proud to be an equal opportunity employer. We evaluate qualified applicants without regard to race, religion, national origin, gender identity or expression, sexual orientation, age, marital or veteran status, disability, or any other protected characteristic under applicable law. Solving global energy challenges requires a wide range of perspectives and experiences, and we are committed to building a team that reflects the world we serve.
Our hiring process is designed to be accessible, fair, and focused on the work that matters most for this role. Reasonable accommodations are available throughout the hiring process and employment—please let us know if you need one.
Ready to apply?
Apply to Arbor Energy