Subassemblies Technician

Commonwealth Fusion Systems LLC; Harvard (MA); On-site; USD 41,000 - 72,000; Full time

Benefits offered by this job

Equity

13 company-wide holidays

Flexible vacation days

Health, dental, and vision insurance

401(k) with employer matching

Professional growth opportunities

Team-building activities

Job summary

Commonwealth Fusion Systems is seeking a Subassemblies Technician to assemble high‑vacuum subassemblies for SPARC. You’ll work with scientists and engineers to ensure parts meet design intent, maintain strict cleanliness, and assist with optical and coil assemblies in a fast-paced environment.

We require a high school diploma or equivalent, 7+ years in technical assembly, forklift operation, and the ability to lift up to 50 lbs. Occasional travel and long hours may be required.

Qualifications

• High school diploma or equivalent.
• 7+ years in a highly technical assembly role in related industries.
• Able to lift up to 50 lbs and travel for required nights/weekends/on-call.
• Experience with basic machining and measurement tools.

Responsibilities

• Build complex and simple subassemblies and components while maintaining all cleanliness specifications.
• Perform testing and check-outs with helium leak checking and other equipment.
• Collaborate with scientists and engineers to ensure assemblies meet design intent.
• Assist with precision alignment and installation of optical systems.
• Maintain cleanliness of work area and clean room; participate in non-conformance resolution.
• Assemble components such as coils, plasma-facing components, antennas, optical assemblies, and port plugs.

Skills

Forklift operation

Measurement tools

Hand-eye coordination

High-precision assembly

Education

High school diploma or equivalent

Tools

Measuring tools

Machining tools

Job description

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.

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


• Depending on your background skill set you would be responsible for assembling:
  
  
  
  • Error Field Correction Coils
  
  
  • Plasma Facing Components
  
  
  • Ion Cyclotron resonate frequency antennas
  
  
  • Optical Assemblies
  
  
  • Bolometer sensor / boxes
  
  
  • Xray sensor / Boxes
  
  
  • Fiber bragg grating thermocouples
  
  
  • Surface Eroding Thermo couples
  
  
  • Wave guilds
  
  
  • Neutron shielding
  
  
  • Port Plugs
  
  
  • Langmuir and shunt probes
  
  
  • ASDEX Gauges
  
  
  • Mineral insulated cables
  
  
  • Test stand assembly and more
  
  
  
  

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

$30 - $52 an hour

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, we’re 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.