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Commonwealth Fusion Systems (CFS)

Senior Manufacturing Engineer

Join Commonwealth Fusion Systems as a Senior Manufacturing Engineer in Devens, Massachusetts. This role focuses on optimizing manufacturing processes, collaborating with design and production teams, and implementing Lean and Six Sigma methodologies. Enjoy competitive compensation, equity, flexible vacation days, and a generous parental leave policy.
Commonwealth Fusion Systems (CFS)
Commonwealth Fusion Systems (CFS)
Devens, Massachusetts, United States   On-site   Full Time   USD 110k–185k yearly  UTC-05:00

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 over $2 billion in capital – more than any other fusion energy company in the U.S.

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 Manufacturing Engineer

We are seeking a detail-oriented, innovative, and results-driven Manufacturing Engineer to join our team. The successful candidate will be responsible for designing, implementing, and optimizing manufacturing processes to improve productivity, efficiency, and quality across the production line. This role involves close collaboration with design engineers, production staff, quality assurance, and supply chain teams.

What you'll do

  • Analyze and improve manufacturing processes to reduce costs, increase efficiency, and ensure product quality
  • Develop and maintain process documentation including work instructions, standard operating procedures (SOPs), and process flow diagrams
  • Collaborate with product design and development teams to ensure manufacturability of new products
  • Implement Lean Manufacturing and Six Sigma methodologies to enhance production performance
  • Lead the design and procurement of tools, fixtures, and equipment required for efficient production
  • Troubleshoot equipment and process issues and implement corrective actions
  • Conduct time and motion studies to determine optimal production methods and labor utilization
  • Support continuous improvement initiatives and implement best practices across the facility
  • Ensure compliance with safety regulations, company policies, and industry standards
  • Evaluate new technologies and automation solutions to enhance manufacturing capabilities

What we're looking for

  • Bachelor’s degree in Manufacturing Engineering, Mechanical Engineering, Industrial Engineering, or related field
  • 5+ years of experience in a manufacturing or production engineering role
  • Strong knowledge of Lean Manufacturing, Six Sigma, and quality systems.
  • Proficient in CAD software (SolidWorks, AutoCAD, etc.) and manufacturing ERP systems.
  • Excellent analytical and problem-solving skills.
  • Strong communication and teamwork abilities.
  • Ability to work in a fast-paced, team-oriented environment

Bonus points for

  • Knowledge of statistical process control (SPC) and failure modes and effects analysis (FMEA)

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
  • 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.

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About the role

August 26, 2025

Full Time

Company

December 27, 2025

On-site

USD 110k–185k yearly

Commonwealth Fusion Systems (CFS)

cfs.energy

  •  Devens, Massachusetts, United States

5+ years in manufacturing or production engineering

UTC-05:00

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