Subassemblies Technician
- Location
- Devens, MA
- Listed
- 7 days ago
What you'll do
- Build complex and simple subassemblies and components while maintaining all cleanliness specification
- Perform testing and check-outs with helium leak checking and various other check-out equipment
- Work together with scientists and engineers to ensure assemblies are meeting their design intent
- Assist with precision alignment and installation of active and passive optical systems
- Actively participate in maintaining mandatory cleanliness of work area and clean room
- Participate in first encounter reviews to quickly overcome non-conformances encountered in the field
What we’re looking for
- High school diploma or equivalent experience
- 7+ years in a highly technical assembly role; e.g., aerospace/aircraft, racing, semiconductor, oil & gas, laboratory, wind, automotive
- Learns from mistakes and builds from them
- Can operate a forklift
- Experience building Intricate projects end to end
- Ability to use basic machining tools; e.g., lathe/mill
- Experience using measurement tools
- Experience rigging and lifting heavy components
- Highly self-motivated, organized, and passionate about their work and curious about what we are building
- Willingness to push through long hours when needed and open to learning new skills
Bonus points
- Soldering experience
- Knowledge of clean room best practices
- Knowledge of cryogenic systems
Essential Requirements
- Ability to occasionally lift up to 50 lbs
- Ability to perform activities such as sitting, climbing, stooping, typing, and standing for extended periods of time
- Willingness to occasionally travel for required nights/weekends/on-call
- Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics
- #LI-Onsite
- At CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. As we grow, we’re eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges.
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.
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, we’re designing and building commercially viable fusion power plants. And we're working with policymakers, suppliers, and many others to build the energy industry of the future.
We’re in the best position to make it happen. Since 2018, we’ve raised $4 billion of capital, making us the largest and leading fusion company in the world.
Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team.
If that’s you and this role fits, we want to hear from you.
Join the power movement as a Subassemblies Technician
The Subassemblies team is responsible for delivering precision, ultra high vacuum subassemblies for seven major teams that go into the SPARC Tokamak. As a Subassemblies Specialist, you will be the last set of hands and eyes on critical parts; as such, meticulous attention to detail in build quality is necessary.
You will draw upon your years of technical experience building complex systems to help streamline workflows and deliver the best possible parts. This role is truly a once in a lifetime opportunity to use hands-on assembly skills to accelerate the development of fusion energy by ensuring SPARC is built on time and to high quality.
The main systems you will be building are high power RF antennas, plasma facing components, port plugs, error field correction coils, vertical stability coils and plasma diagnostics; the bespoke tools used for real-time control of a burning plasma and to achieve SPARC's science mission.
Equal opportunity and legal notices
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.
From Commonwealth Fusion Systems's careers page, first listed on Rolev.ai on November 2, 2026. Rolev.ai is not the employer.
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Common questions
Where is the Subassemblies Technician job at Commonwealth Fusion Systems located?
This Subassemblies Technician position at Commonwealth Fusion Systems is located in Devens, MA. Always check Commonwealth Fusion Systems's application page for specific state eligibility or relocation policies.
How do I apply for the Subassemblies Technician position at Commonwealth Fusion Systems?
This listing links directly to Commonwealth Fusion Systems's Lever application page. You can apply directly on Commonwealth Fusion Systems's site, or use Rolev.ai to check your resume fit, generate a zero-hallucination tailored resume and cover letter for this posting, and autofill the Lever application form in 1 click with the Rolev.ai Chrome extension. You always review the form and press Submit yourself.