Machinist - Contract
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 2026-01-02 | 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 Contract Machinist
This position will be responsible for machining or modifying parts per use of verbal communication, drawings and solid models using standard machine shop tooling such as 3 axis machining centers, waterjet, Trak mill and lathe, surface grinder and standard equipment.
What you'll do
- Safely program, set-up and operate multiple CNC equipment with minimal assistance
- Simultaneously operate more than one CNC machine at a time
- Read and adhere to all verbal and written processes
- Inspect product utilizing visual and hand inspection equipment (microscopes, vernier calipers, micrometers, drop indicators, profilometer, etc.)
- Inspect, change and make offsets to cutting tooling in CNC equipment
- Use 5S to maintain a clean and safe workspace
- Perform daily preventative maintenance on equipment
- Interact in a professional manner with coworkers on a daily basis
What we're looking for
- Formal trades or apprenticeship programs
- Higher level trade school certification or degree
- 5 years experience in CNC machine trade
- Good computer skills
- Experience programming with cad
- Basic knowledge of G-code
- Strong work ethic and high attention to detail
- Flexible ability to work in a fast-paced team environment
- Ability to manage sensitive and sometimes confidential information
- Great communication skills
- Openness to working overtime or to arrange start time to benefit part run times as required
- Basic knowledge of welding and torches
- Knowledge of how to use a plasma cutter
- Basic knowledge of sheet metal fabrication
- Trained in time management
Bonus points for
- Knowledge of how to calculate tolerance changes to atmospheric temperature changes in shops (CTE)
- Full knowledge of Mastercam
- Experience with Haas machining centers
- 4 and 5 axis machining experience
- Waterjet experience
- EDM (electrical discharge machine) experience
Must-have Requirements
- Ability to lift up to 50 lbs
- Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics
- Perform activities such as typing, standing, or sitting for extended periods of time
- Willingness to travel or work required nights/weekends/on-call occasionally
$35 - $50 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
December 2, 2025
Contract Position
Company
January 9, 2026
On-site
USD 35–50 per hour
- Devens, Massachusetts, United States
5 years in CNC machine trade
UTC-05:00
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