Lead RF Electro-Mechanical Technician
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.
Last updated on Feb 23, 2026 | 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 a Lead RF Electro-Mechanical Technician
We are seeking a highly motivated Lead RF Electro-Mechanical Technician to join our team of physicists, engineers, and technicians in our core mission: accelerating the development of fusion energy.
In this highly independent working lead role, you will navigate a dynamic environment split between cutting-edge R&D and assembly-focused manufacturing. You will act as the vital interface between the shop floor and engineering, translating engineering priorities into daily action for a small technician team.
We know the perfect candidate might not be an expert in every single task listed below on day one. What matters most is that you are a reliable leader, a strong communicator, and a skilled technician ready to turn wrenches, learn fast, and bridge the gap between engineering and assembly.
What you'll do
- Leadership & Agile Iteration
- Direct the day-to-day activities of a small technician team
- Act as the primary interface with engineers, collaborating closely to troubleshoot, adapt, and iterate on designs in a fast-paced, agile manner
- Hands-on Assembly & Fabrication
- Lead by example on the shop floor
- Use hand and power tools to assemble complex components for RF transmitters, build I&C (Instrumentation and Controls) cabinets, and integrate various sensors and mechanical systems
- High-Voltage & Testing
- Work safely and confidently with 480V electrical systems
- Handle RF and electrical test equipment to validate builds and ensure systems are functioning correctly from start to finish
- Precision Work
- Perform detailed technical tasks, including plumbing, wiring, and soldering, while maintaining meticulous attention to detail and cleanliness
- Safety & Quality Standards
- Operate and maintain highly technical apparatus with a steadfast commitment to safety and quality, setting the standard for your team
- Ensure safety is always the first priority in any testing activity
- Train other technicians and equipment operators in the I&C equipment commissioning and troubleshooting
- Report on and be accountable for progress to their supervisor
What we're looking for
- High school diploma, equivalency certificate, or higher (Note: Graduation from a two-year technical school or military technical training is highly acceptable and welcomed)
- Minimum of 10 years' experience with hand/power tools, machine shop equipment, and a variety of technical support skills (mechanical/electrical assembly, plumbing, soldering, and wiring)
- Hands-on experience working safely with high voltage (up to 480V)
- Hands-on experience with RF and electrical measurement/test equipment
- Strong foundational understanding of mechanical and electrical systems, alongside basic computer proficiency (email, video conferencing, data entry, etc.)
- Excellent communication and teamwork skills. Ability to take direction from leadership, work independently, and thrive in an agile environment balancing R&D and manufacturing demands
Bonus points
- Soldering of RF components on circuit boards.
- Ability to read and interpret complex electrical schematics and wiring diagrams
Must-have requirements
- Perform activities such as stooping, climbing, typing, standing, sitting, etc. for extended periods of time
- Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics
- 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
- Willingness to occasionally travel or work required nights/weekends/on-call
$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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Job expired?Please let Commonwealth Fusion Systems know you found this job on Rejobs. This will help us grow and get more people to work on renewable energy!
Apply now
Job expired?Please let Commonwealth Fusion Systems know you found this job on Rejobs. This will help us grow and get more people to work on renewable energy!
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About the role
April 6, 2026
Full time
Company
- Devens, Massachusetts, United States
Minimum of 10 years
UTC-05:00