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Senior Mechanical Engineer – Cable Magnets
Job Location:
Job Location:
Devens, MA - USA
Yearly Salary:
$ 110000 - 185000
Yearly Salary:
Posted:
22 August 2026 (Yesterday)
Posted:
Application Deadline:
19 November 2026
Application Deadline:
Vacancies:
1 Vacancy
Vacancies:
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 a Senior Mechanical Engineer Cable Magnets
As a Senior Mechanical Engineer for the Cable Magnets Engineering team you will own hardware from early concepts to delivery. You will develop the design performing thermal structural and electromagnetic analysis to ensure the hardware meets requirements. You will develop design notes technical specifications and other documentation necessary to manufacture and install the Cable Magnet hardware and supporting your role you will also support procurement in the preparation and execution of manufacturing contracts and support CFS production and assembly teams through build and installation of your designs.
What youll do:
- Act autonomously as the primary owner of cable magnet hardware for SPARC ARC or other projects ensuring designs are completed validated procured built and installed correctly and on time
- Produce new and iterate on existing design concepts using a deep understanding of physics structural mechanics and analysis techniques for both metallics and composites
- Liaise with partner teams such as R&D analysis manufacturing and procurement to drive completion of program milestones in a timely fashion
- Diagnose issues on the production and assembly line and provide immediate path forward based on known understanding of hardware. Propose and implement design solutions based on root cause
- Prepare reports presentations and other documentation to serve as design documentation and validation of final Cable Magnet systems
- Mentor junior engineers and assist in establishing and implementing engineering best practices
What were looking for:
- Bachelors degree in mechanical engineering aerospace engineering or another relevant field
- A minimum of 7 years of engineering design and analysis experience is required including at least 2 years providing engineering support to production hardware in the form of resolving technical issues and implementing design for manufacturing or assembly changes
- Relevant hands-on experience in the form of parts designed for high loads and/or extreme environments
- Excellent fundamental knowledge of mechanical systems such as static structures and heat transfer (required)
Familiarity with all steps in the design process with an emphasis on creativity simplicity and execution (required) - Be self-motivated committed to self-growth and exhibit excellent problem-solving skills (required)
- CAD proficiency (required) NX preferred any acceptable
- FEA (required) ANSYS and COMSOL preferred
- Expertise in AMSE Y14 GD&T principles (preferred)
Bonus points for:
- Demonstrated record of design of mechanical components beyond desktop scale. E.g. high power (MW) high mass (ton) high force (MN)
- Experience in production or heavy equipment assembly environments
- Design experience with
Electromagnets
Vacuum systems
Welding
Composite materials
Radiation environments
Cryogenic environments
Must-have requirements:
- Perform activities such as sitting for extended periods of time
- 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
- Perform activities such as sitting for extended periods of time
- Occasional travel occasional nights/weekends/on-call
$110000 - $185000 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-Hybrid
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:
Senior IC
