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R&D Production Test Engineer

Commonwealth Fusion Systems

Job Location:

Devens, MA - USA

Yearly Salary: USD 70000 - 120000

Posted: 29 September 2026 (6 days ago)

Application Deadline: 27 December 2026

Vacancies: 1 Vacancy

Job Summary

About Commonwealth Fusion Systems:

Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy.

Combining decades of research top talent and new technologies were designing and building commercially viable fusion power plants. And were working with policymakers suppliers and many others to build the energy industry of the future.

Were in the best position to make it happen. Since 2018 weve raised $4 billion of capital making us the largest and leading fusion company in the world.

Now were looking for more thinkers doers builders and makers to join us. People wholl bring new perspectives solve tough problems and thrive as part of a team.

If thats you and this role fits we want to hear from you.

Join the power movement as an R&D Production Test Engineer

Were seeking an experienced Test Engineer to support the testing and de-risking of our cutting-edge HTS magnet technology playing a key role in advancing fusion energy. Embedded within our R&D organization youll take on a broad range of responsibilities from developing methodologies and procedures with magnet physicists to conducting root cause analysis alongside manufacturing experts working with complex new materials. This dynamic role demands flexibility cross-disciplinary collaboration and the ability to execute tests on tight timelines. Youll lead the integration and operation of complex test stands define safety standards develop and refine procedures and drive continuous improvement to help achieve our extraordinary milestones in making fusion a reality.

What youll do:

Lead magnet and other test campaigns in cryogenic vacuum and high-current environments
Develop detailed test procedures and ensure data integrity with robust instrumentation and controls
Support improvements to test stands optimizing for test rate and ensuring data quality
Design analyze and build test equipment including mechanical electrical and fluid systems
Maintain and document test requirements risks and safety protocols
Manage test schedules budgets and technical documentation (P&IDs CAD designs schematics etc.)
Improve test processes for repeatability and efficiency
Analyze test data create custom tools for data analysis and present findings to cross-functional teams
Lead anomaly investigations and resolution collaborating with physicists and engineers

What were looking for:

Bachelors (or higher) in engineering or applied physics with 2 years of hands-on testing experience
Expertise in test stand operation data collection and cross-functional collaboration
Strong background in test planning data analysis and test equipment design
Experience with electromagnetic fundamentals and troubleshooting complex systems
A passion for process improvement and innovative problem-solving
Excellent communication skills with the ability to present technical topics clearly
Self-motivated results-driven and eager to learn

Bonus points for:

Experience with structural FEA software particularly ANSYS and COMSOL
Proficiency in using NX and Teamcenter for designing complex test equipment and assemblies
Experience with Ignition for developing Human Machine Interfaces
Proficiency in using Jira or similar ticket and task tracking software for managing projects and status
Experience with large-scale data collection manipulation and analysis to derive actionable insights
Hands-on experience operating complex test stands for long-duration test campaigns

Must-have requirements:

Ability to occasionally lift up to 50 lbs
Perform activities such as typing climbing standing stooping or sitting for extended periods of time
Willingness to occasionally travel or work required nights/weekends/on-call
Work in a facility that contains industrial hazards including heat cold noise fumes strong magnets lead (Pb) high voltage high current pressure systems and cryogenics

$70000 - $120000 a year

Salary range for this full-time position equity benefits.The actual salary will depend on level location qualifications and experience. The range displayed on each job posting reflects new hire salaries for the position across all US locations.

Benefits include:

Competitive compensation with equity

13 Company-wide Holidays

Flexible vacation days

10 sick days

Generous parental leave policy

Health dental and vision insurance

401(k) with employer matching

Professional growth opportunities

Team-building activities

#LI-Onsite

At CFS we excel in fast-paced environments driven by our values of integrity execution impact and self-critique. As we grow were eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges.

We value diversity deeply and are proud to be an equal opportunity employer by choice. We consider all qualified applicants equally regardless of race color national origin ancestry citizenship status protected veteran status religion physical or mental disability marital status sex sexual orientation gender identity or expression age or any other basis protected by law.

This role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively Export Control Laws). Any offer of employment will be contingent on the need for compliance with such Export Control Laws.

Required Experience:

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