R&D Operational Testing Lead
Commonwealth Fusion Systems
Company Overview
Commonwealth Fusion Systems (CFS)
Cambridge, MA, United States
2018
Approximately 430 employees (source: zoominfo.com). Revenue figures vary, with reports indicating $211.3 million or $31.7 million, though as a pre-revenue fusion developer focused on R&D, these may reflect funding or operations rather than sales.
What They Do
Commonwealth Fusion Systems (CFS) is a pioneering private fusion energy company that specializes in tokamak-based magnetic confinement fusion. Founded as a spinout from MIT's Plasma Science and Fusion Center, CFS focuses on utilizing high-temperature superconducting magnets to achieve commercial net energy production (source: cfs.energy). The company has made significant strides in its technology, particularly with the development of compact fusion machines that leverage decades of tokamak science. Their flagship projects, SPARC and ARC, aim to demonstrate net energy gain and commercial viability in the coming years (source: cfs.energy).
Projects & Track Record
CFS is currently engaged in several groundbreaking projects, most notably the construction of SPARC, which is set to be the world's first net-energy fusion machine. Located at their Fusion Energy Campus in Devens, Massachusetts, SPARC aims to demonstrate net energy gain by the late 2020s (source: cfs.energy). Additionally, CFS is planning the ARC project, a 400 MW-class grid-scale tokamak power plant designed for commercial deployment in the early 2030s. These projects are underpinned by significant technological advancements, including the successful testing of the central solenoid magnet module (CSMC) in November 2024, which confirmed the manufacturability of critical components for SPARC (source: zoominfo.com).
Recent Developments
In the past two years, CFS has made remarkable progress, including the opening of its Devens Fusion Energy Campus on February 10, 2023, which was attended by notable figures such as U.S. Secretary of Energy Jennifer Granholm (source: cfs.energy). The company has also secured substantial funding, raising $863 million in August 2024, building on a previous $1.8 billion round in May 2023, bringing total funding to over $2 billion (source: wbjournal.com). Furthermore, CFS announced its first commercial power plant site in Chesterfield County, Virginia, which will be independently financed and operated, with plans for grid connection in the early 2030s (source: zoominfo.com).
Working There
CFS offers a range of roles across various disciplines, including fusion science, engineering, manufacturing, and materials science. The majority of their workforce is based at the Devens campus, which has grown to over 430 employees (source: cfs.energy). The company culture emphasizes rapid execution and transparency, attracting top talent from the fusion and manufacturing sectors. Key executives include Co-Founder and CEO Bob Mumgaard, along with other leaders in operations and science, indicating a strong demand for expertise in tough tech and physics (source: nasdaqprivatemarket.com). While specific benefits are not detailed, the scale-up and investor backing suggest competitive packages for high-caliber roles in a mission-driven environment (source: cfs.energy). Job seekers are encouraged to monitor their careers page for openings related to SPARC and ARC advancements.
Contact
Last updated on 2026-02-12 | Report an issue
Job Description
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 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 an R&D Operational Testing Lead
The lead test operator position is an integral part of the CFS team responsible for testing our critical superconducting magnets and maintaining the test stand in which they are tested. You will have the opportunity to work within a fast-paced, exciting atmosphere to help the team meet the global necessity for clean energy. In this role you will lead a team of operators and perform hands-on work to prioritize daily shift operations to maintain high throughput in test by executing tests, successfully performing preventative maintenance to ensure the production test stands remain operational, building out new test stand hardware, and seeking out opportunities to continuously improve the efficiency of the test stand operation.
Responsibilities include build, servicing and repair of cryogenic, electrical, high-vacuum and or chilled water systems as well as on-console operation of the test stands in support of magnet performance verification. This role will lead the way to making Earth sustainable for the future to come.
What you'll do
- Lead a team of operators executing tests on superconducting magnets and maintaining the test stand
- Identify and lead safety improvements related to the design, processes, and operation of the test stands
- Perform test operations and ensure rigorous team adherence to procedures, specifications, and test instructions process to maximize test throughput and minimize rework
- Build, operate and maintain high-powered, cryogenic, high-vacuum, magnet test equipment
- Track changes to the configuration of the test stand by documenting the work completed
- Troubleshoot and resolve test stand issues - focusing on continuous improvement
- Work within a multi-disciplinary team to develop and qualify new operating techniques and processes
- Use various mechanical and precision calibrated tools such as torque wrenches, wrenches, allen keys, micrometers, and calipers
- Read and interpret assembly drawings, wiring diagrams and detailed work instructions
- Communicate challenges and ideas effectively to peers and leadership
- Perform other related job duties, as assigned by management
- Identify problems in a product and make clear recommendations to better the process
- Display great attention to detail and a sound understanding of what makes a good product
What we're looking for
- High school diploma/equivalency certificate or higher
- Minimum of 2 years' experience in a formal leadership role in a manufacturing setting
- Minimum of 5+ years experience with various hand tools
- Mechanical, High-Vacuum, Cryogenic, Electrical systems maintenance and/or assembly
- Commitment to safety and quality with the ability to communicate this to your team
- Strong level of accountability for yourself and your team
- Ability to lead a team and give clear and precise direction
- Ability to take directions from supervisors and work independently
- Desire to work and contribute in a fast-paced, environment with daily changes
- Excellent communication (written and verbal) to your team, including daily and weekly goals
- Meticulous attention to detail and cleanliness with hands-on work
Bonus points for
- Acceptance testing
- Data processing
- MA Crane/Rigging license
- PLC Experience
- Basic power tools
- Electrical schematic and wiring
- Harness builds / Wiring
- Soldering
- Commitment to safety and quality
- Ability to take directions from leadership and work independently
- Desire to work and contribute in a fast-paced environment
- Ability and patience to work through projects from start to finish, including assembly and testing
- Ability to represent the Company in a positive and professional manner at all times
Must-have requirements
- Ability to occasionally lift up to 50 lbs
- Perform activities such as typing, stooping, standing, or sitting for extended periods of time
- Willingness to travel or work required nights/weekends/on-call occasionally
- Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics
$40 - $65 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
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
February 18, 2026
Full Time
Company
February 21, 2026
On-site
USD 40–65 per hour
- Devens, Massachusetts, United States
Minimum of 5+ years experience with various hand tools and 2 years in a leadership role.
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