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Commonwealth Fusion Systems (CFS)

Subassemblies Technician (m/w/d)

Become a Subassemblies Technician with Commonwealth Fusion Systems in Devens, Massachusetts. This role involves building precision subassemblies for fusion energy projects, ensuring high quality and cleanliness. Enjoy a competitive hourly wage of $35 - $43 and the chance to work on groundbreaking technology in a diverse and inclusive environment.
Commonwealth Fusion Systems (CFS)
Commonwealth Fusion Systems (CFS)
Devens, Massachusetts, United States   On-site   Contract Position   USD 35–43 per hour  UTC-05:00

Commonwealth Fusion Systems (CFS)

Company Overview

Commonwealth Fusion Systems

Cambridge, MA, United States

2018

Business Model

Energy

Commonwealth Fusion Systems focuses on developing advanced fusion energy technology. Their core activities include research and development of superconducting magnets and fusion reactors aimed at providing a clean and virtually limitless energy source.

Their revenue streams primarily come from government grants, private investments, and partnerships with various organizations in the energy sector.

Locations & Geography

Commonwealth Fusion Systems operates primarily in the United States, with a significant presence in Cambridge, MA. They are also involved in international collaborations, expanding their influence in the global energy landscape.

Company Culture

Their mission is to accelerate the development of fusion energy to provide a sustainable and clean energy future. They value innovation, collaboration, and a commitment to scientific excellence.

Commonwealth Fusion Systems fosters a dynamic and inclusive work environment that encourages creativity and teamwork. Employees are motivated to push the boundaries of science and technology in a supportive atmosphere.

They emphasize continuous learning and professional growth, offering various training programs and opportunities for employees to advance their skills in the field of fusion energy.

Activities & Projects

Commonwealth Fusion Systems is currently working on the SPARC project, which aims to demonstrate net-positive energy from a fusion reactor. This project is a significant step towards commercial fusion energy.

They are pioneering the use of high-temperature superconductors in fusion technology, which enhances the efficiency and feasibility of fusion reactors. This innovation is crucial for making fusion energy a reality.

Their sustainability practices focus on developing clean energy solutions that minimize environmental impact. By harnessing fusion energy, they aim to provide a sustainable alternative to fossil fuels.

Career Opportunities

Commonwealth Fusion Systems typically has openings for roles in engineering, research, and project management. They seek individuals passionate about advancing fusion technology and contributing to a sustainable energy future.

They offer competitive salaries, comprehensive health benefits, and opportunities for professional development. Employees also enjoy a collaborative work culture that values innovation and creativity.

Contact Information

LinkedIn

cfs.energy

Careers at Commonwealth Fusion Systems


Last updated on 2025-03-27 | Report an issue

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 working with policymakers and suppliers to build the energy industry of the future.

We're in the best position to make it happen. Since 2018, we've raised nearly $3 billion in capital, making us the largest and leading private 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 ten major teams that go into the SPARC Tokamak. As a Subassemblies Technician, 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 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 specifications
  • Perform testing and check-outs with helium leak checking and various other check-out equipment
  • Assist with precision alignment and installation of active and passive optical systems
  • Actively participate in maintaining mandatory cleanliness of work area and clean room
  • Assist other CFS teams with related skilled work

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
  • Can operate a forklift
  • Experience completing large scale projects end to end
  • Experience using measurement tools
  • Experience using JIRA, Manufacturo, or other software based tracking
  • Highly self-motivated, organized, and passionate about their work

Bonus points

  • Welding experience
  • Knowledge of clean room best practices
  • Knowledge of cryogenic systems
  • Knowledge of six sigma process
  • Wiring and soldering experience

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

$35 - $43 an hour

This is a contract position.

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.

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About the role

November 20, 2025

Contract Position

Company

November 20, 2025

On-site

USD 35–43 per hour

Commonwealth Fusion Systems (CFS)

cfs.energy

  •  Devens, Massachusetts, United States

7 years in a highly technical assembly role

UTC-05:00

Apply now

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