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Commonwealth Fusion Systems

Shift Operations Engineer - SPARC

Join Commonwealth Fusion Systems in Devens, Massachusetts as a Shift Operations Engineer for the SPARC fusion plant. Operate and maintain critical systems like electrical and cooling infrastructure in a dynamic, high-impact environment. Enjoy competitive pay, equity, flexible vacation, and comprehensive benefits.
Commonwealth Fusion Systems
Commonwealth Fusion Systems
Devens, Massachusetts, United States On-site Full time USD 90k–145k yearly UTC-05:00

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 Shift Operations Engineer - SPARC

Reporting to the Manager of SPARC Plant Operations, the Shift Operations Engineer is a foundational member of the team responsible for the preparation, commissioning, and 24/7 operation of the SPARC fusion facility. As an operator of the SPARC plant, you will ensure the reliability of critical infrastructure, including electrical distribution, cooling water, compressed air, HVAC, cryogenic cooling systems, and HTS magnets.

The Shift Operations Engineer will also contribute to procedure development, commissioning, maintenance planning, work management, troubleshooting, testing, and training. This is a high-impact role requiring a self-motivated engineer who thrives in a dynamic, "first-of-a-kind" environment where troubleshooting and rigorous operational standards are the norms.

What you'll do

  • Operate, maintain, and test equipment, components, and systems associated with plant operations
  • Troubleshoot assigned systems and equipment, including cooling water, compressed air, HVAC, liquid nitrogen, cryogenic plant, and electrical distribution
  • Coordinate, oversee, and/or perform field work activities, ensuring safe and efficient execution
  • Operate plant equipment in compliance with established safety protocols
  • Perform switching and tagging (LOTO) to support site maintenance and operations
  • Develop new operating procedures for systems being designed, built, and commissioned
  • Create maintenance plans for new systems to ensure long-term reliability
  • Support training efforts to prepare operations staff for safe and effective plant operations
  • Work 12-hour, rotating shifts (including days, nights, weekends, and holidays) to ensure full time coverage of the facility

What we're looking for

  • High School Graduate/GED or Bachelors degree
  • 5+ years in operations at complex facilities
  • Experience in high-voltage and/or complex electrical environments
  • Experience with large cooling water systems
  • Previously qualified in Lockout/Tagout (LOTO) / Tagging Program
  • Complex facility operations (power plant, oil & gas, LNG, etc.)
  • Strong safety background
  • Comprehensive understanding of engineering principles and theory of operation of mechanical, electrical, and hydraulic systems
  • Well-developed analytical and problem-solving skills
  • Excellent communication skills (written and verbal)
  • Ability to adapt and excel in a constantly changing environment
  • Demonstrated ability to learn new systems and concepts quickly

Bonus points for

  • Bachelors Degree in Engineering or related field
  • Experience in radiological environments
  • Experience with cryogenic plants
  • Strong background in Human Performance principles
  • Experience with high-voltage electrical systems
  • Software controls development

Must-have Requirements

  • Perform extended activities such as stooping, climbing, typing, standing, sitting, etc.
  • Willingness to travel or work required nights/weekends/on-call regularly
  • 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

$90,000 - $145,000 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.

Apply now

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About the role

March 18, 2026

Full time

Company

March 18, 2026

On-site

USD 90k–145k yearly

Hydrogen

Commonwealth Fusion Systems

cfs.energy

  •  Devens, Massachusetts, United States

5+ years in operations at complex facilities

UTC-05:00