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 Lead RF Electro-Mechanical Technician

We are seeking a highly motivated 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:

Hands-on Assembly & Fabrication:

Use hand and power tools to assemble complex components for RF transmitters

Build I&C (Instrumentation and Controls) cabinets

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

Work with other technicians and equipment operators in the I&C equipment commissioning and troubleshooting

Safety & Quality Standards:

Operate and maintain highly technical apparatus with a steadfast commitment to safety and quality, following the current team’s standards

Ensure safety is always the first priority in any testing activity

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 5 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:

Ability to occasionally lift up to 50 lbs
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

#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.

RF Electro-Mechanical Technician

Job Description

What you'll do:

What we’re looking for:

Bonus points:

Must-have requirements:

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