Director of Magnet Engineering
Commonwealth Fusion Systems (CFS)
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 2025-12-26 | 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 Director of Magnet Engineering
CFS is designing SPARC, a tokamak able to achieve net energy plasmas. SPARC includes HTS and copper magnets, thermal shields, vessels and plasma facing components, all subject to large operational loads (thermal, electromagnetic, etc) and competing for space. As the Director of Magnet Engineering, you will manage the engineering staff responsible for designing and delivering our HTS Magnets to support SPARC and beyond.
What you'll do
- Lead the CFS Magnet Engineering team
- Hire and develop outstanding engineers to design and build our HTS magnets
- Plan, organize and manage the work of the team accordingly
- Create metrics, and delivery goals for the team
- Establish best practices, workflows and standards for the unique domain of HTS magnet design (extreme loads, vacuum and cryo operation, EM considerations)
- Set clear design standards and ensure they are aligned with project needs
- Ensure that released drawings and engineering products are correct and of high quality
- Drive team to meet needed deadlines
- Establish and manage budgets for team overhead and contract support
- Provide guidance and direction to the team to ensure operational and technical excellence
- Work with the other engineering team leaders to resolve technical issues
What we're looking for
- Bachelor's degree in Mechanical Engineering (or similar engineering discipline)
- 15+ years of experience in the engineering of magnets or similarly complex hardware systems
- Experience with developing and designing hardware systems through the use of 3D modeling and simulation software
- 5+ years of supervisory experience with at least 10 individuals
- Experience designing for environments with extreme thermal variations
- Ability to develop and manage design procedures
- Familiarity with codes including ASME standards
- Experience with CAD design tools such as: NX, Creo, SolidWorks, etc.
- Ability to clearly express and critique ideas
- Attention to detail
- Emphasis on elegance and simplicity over complexity
- Drive towards commercially viable solutions
- Values that align with our company's values of integrity, execution, impact, and self-critique
Bonus points for
- Experience with REBCO and high-temperature superconducting tape
- Experience designing high-field magnets
- Experience designing for and operating in ultra-high vacuum environments
- Experience designing and operating cryogenic fluid systems
Must-have Requirements
- Perform activities such as typing, standing, or sitting for extended periods of time
- Dedication to safety to mitigate hazards that may include heat, cold, noise, fumes, strong magnets, lead, high voltage, and cryogenics
- Willingness to travel or work required nights/weekends/on-call occasionally
$170,000 - $250,000 a year
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
- 12.5 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
October 27, 2025
Full Time
Company
December 26, 2025
On-site
USD 170k–250k yearly
Commonwealth Fusion Systems (CFS)
- Devens, Massachusetts, United States
15+ years in engineering, with 5+ years in supervisory roles
UTC-05:00
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