Senior Controls Engineer
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
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 Senior Controls Engineer
As a Senior Controls Engineer, you are an expert in core functions and have a deep understanding of specific domains. You will take independent ownership of developing execution approaches for complex machine and process concepts, operating with little direction from management. You will generate detailed work plans, define milestones for complex work, and define processes that impact the broader department. You will act as a technical leader, providing expertise for long-term assignments and mentoring junior engineering staff.
What you'll do
- Lead the initial equipment conceptual development while balancing product specifications, process control requirements, layout complexity, and lead time limits
- Provide technical leadership on medium to long-term problems and provide expertise outside of the immediate group
- Create and approve robust system architectures and electrical schematics (compliant with NFPA79/NEC/UL508A standards) for manufacturing and test equipment
- Write and debug PLC structured text with an emphasis on code that is organized, documented, maintainable, and reusable
- Contribute to department policies, tool development, and the characterization of automated processes using data-driven approaches like Cpk and Gage R&R
- Respectfully challenge and influence cross-functional peers to achieve alignment on the best path forward, leveraging data and rationale to support your point of view
- Regularly help onboard peer employees and formally mentor junior colleagues to support their professional growth and skill development
- Identify and mitigate low and medium risks while identifying larger risks and proposing solutions to management
What we're looking for
- Bachelor's degree in engineering field is required
- 7+ years' experience as controls engineer on complex electro-mechanical systems
- Mastery of programming and troubleshooting automation controllers in all IEC 61131-3 designated languages
- Proven ability to apply sound reasoning and considerable judgment in ambiguous situations where decisions impact large portions of a project
- Experience with control reliable safety systems (ANSI/RIA15.06/OSHA compliant) and enclosure design standards
- A reliable and persistent work ethic, seeing tasks through to completion and staying determined in the face of uncertainty and failure
- Familiarity with rotating machinery, cable winding, soldering, and/or pipe bending
- Expertise in enclosure design compliant with NFPA79/NEC/UL508A standards
- Collaboration experience with job shops and external vendors
- High self-motivation and drive to execute quickly with excellent troubleshooting and problem-solving skills
- A value for design for manufacturability, serviceability, and simplicity over complexity
Bonus points for
- Experience in Beckhoff and Siemens controls platforms
- Experience in Ignition SCADA systems
- Machine Vision experience
- Greenfield or brownfield startup commissioning experience
- Expertise with CAD drafting, specifically AutoCAD Electrical
Must-have requirements
- Ability to lift up to 50 lbs occasionally
- Perform activities such as typing, standing, stooping, and 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 occasionally travel or work required nights/weekends/on-call
$110,000 - $185,000 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
- 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. It helps us grow and get more people working in renewable energy.
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About the role
June 11, 2026
Full time
Company
- Devens, Massachusetts, United States
7+ years
UTC-05:00