Commonwealth Fusion Systems

Staff Engineer, Controls and Software

Join Commonwealth Fusion Systems in Milpitas as a Staff Engineer, Controls and Software. Lead design and commissioning of control systems for fusion energy equipment. Enjoy competitive pay, equity, flexible vacation, and comprehensive benefits in a mission-driven team.
Commonwealth Fusion Systems
Commonwealth Fusion Systems
Milpitas, United States On-site Full time USD 160k–220k yearly UTC-07:00

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 Staff Engineer, Controls and Software

As a Staff Controls and Software Engineer, you will be responsible for developing machine and operational concepts in collaboration with R&D staff and engineering peers. You will create a robust system architecture to support all controls components such as PLCs, safety devices, HMIs, servo drives, and more. For each project you will work from initial design all the way through commissioning, operational fine-tuning, and validation to ensure that all systems function reliably and meet their design goals. Additionally, you will work closely with cross-functional teams throughout the entire life cycle of the equipment and its operation. You will work with simulation and test engineers to integrate your designs into software testbeds, hardware testbeds, and the tools.

What you'll do

  • Work closely with R&D team to outline interfaces and requirements for equipment and software operation for equipment control
  • Participate in initial equipment conceptual development and balance product specifications, operational control requirements, layout complexity, cost, quality, and lead time limits
  • Design, modify, and approve electrical schematics for industrial and test equipment (compliant with NFPA79/NEC/UL508A standards)
  • Create machine interactions with plant-wide SCADA to communicate product acceptability, machine status, and operational variables
  • Write, and debug PLC structured text with an emphasis on generating code that is organized, structured, documented, maintainable, and reusable. PLC code will interact with subsystems and 3rd party equipment
  • Implement (ANSI/RIA15.06/OSHA compliant) control reliable safety systems for safeguarding industrial equipment
  • Generate aesthetically simple HMI screens for complex machinery while providing sufficient feedback for troubleshooting
  • Debug and optimize automated operations to maximize cycle time, improve availability, and yield
  • Work with external software contractors to develop the control systems for internal tools (Define requirements, manage priorities, drive testing and implementation plans)

What we're looking for

  • A bachelor's degree in a relevant engineering field (e.g., EE, mechatronics, software)
  • 10+ years of experience as a controls engineer on complex mechanical systems -- for example: design, construction, and operation of controls for industrial, large-scale equipment
  • Hands-on experience with industrial control system implementation, including specifying, building, and commissioning industrial control panels, experience with 480VAC power systems, configuring industrial fieldbus' and components
  • Proficient in AutoCAD Electrical, for schematic and cable designs
  • Familiar in structured text programming and the TwinCAT IDE
  • Familiar with TwinSAFE safety PLC programming
  • PLC programming experience in IEC 611:31-3 languages
  • Familiar with modern tools like GitHub and CI/CD release management
  • Familiarity with Python
  • HMI design, implementation and maintenance
  • Inductive Automation's Ignition platform

Bonus points for

  • Experience with Semiconductor Capital Equipment manufacturing
  • Experience with enclosure design compliant with NFPA79/NEC/UL508A standards
  • Experience developing and tuning control loops

Must-have requirements

  • Ability to lift up to 50 lbs occasionally
  • Perform activities such as stooping, climbing, standing, sitting for extended periods of time
  • Willingness to travel or work required nights/weekends/on-call occasionally
  • Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics

$160,000 - $220,000 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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About the role

July 1, 2026

July 3, 2026

Full time

On-site

Company

USD 160k–220k yearly

Hydrogen

Commonwealth Fusion Systems

cfs.energy

  •  Milpitas, United States

10+ years

UTC-07:00