Rejobs
Commonwealth Fusion Systems (CFS)

Senior Mechanical Engineer (m/w/d)

Become a Senior Mechanical Engineer at Commonwealth Fusion Systems in Devens, Massachusetts. Lead the design and assembly of structural components for fusion energy systems. Enjoy competitive compensation, equity, and generous parental leave.
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

Cambridge, MA, United States

2018

Business Model

Energy

Commonwealth Fusion Systems focuses on developing advanced fusion energy technology. Their core activities include research and development of superconducting magnets and fusion reactors aimed at providing a clean and virtually limitless energy source.

Their revenue streams primarily come from government grants, private investments, and partnerships with various organizations in the energy sector.

Locations & Geography

Commonwealth Fusion Systems operates primarily in the United States, with a significant presence in Cambridge, MA. They are also involved in international collaborations, expanding their influence in the global energy landscape.

Company Culture

Their mission is to accelerate the development of fusion energy to provide a sustainable and clean energy future. They value innovation, collaboration, and a commitment to scientific excellence.

Commonwealth Fusion Systems fosters a dynamic and inclusive work environment that encourages creativity and teamwork. Employees are motivated to push the boundaries of science and technology in a supportive atmosphere.

They emphasize continuous learning and professional growth, offering various training programs and opportunities for employees to advance their skills in the field of fusion energy.

Activities & Projects

Commonwealth Fusion Systems is currently working on the SPARC project, which aims to demonstrate net-positive energy from a fusion reactor. This project is a significant step towards commercial fusion energy.

They are pioneering the use of high-temperature superconductors in fusion technology, which enhances the efficiency and feasibility of fusion reactors. This innovation is crucial for making fusion energy a reality.

Their sustainability practices focus on developing clean energy solutions that minimize environmental impact. By harnessing fusion energy, they aim to provide a sustainable alternative to fossil fuels.

Career Opportunities

Commonwealth Fusion Systems typically has openings for roles in engineering, research, and project management. They seek individuals passionate about advancing fusion technology and contributing to a sustainable energy future.

They offer competitive salaries, comprehensive health benefits, and opportunities for professional development. Employees also enjoy a collaborative work culture that values innovation and creativity.

Contact Information

LinkedIn

cfs.energy

Careers at Commonwealth Fusion Systems


Last updated on 2025-03-27 | 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 a Senior Mechanical Engineer - TF Structures

As a Mechanical Engineer for the SPARC Toroidal Field (TF) Coil System Structures team, you will be a product owner responsible for the design, production support, and assembly of structural components and insulation in our HTS magnet systems. You will work closely with our Production, Assembly, and Procurement teams to ensure components meet requirements and are delivered on-time. Your responsibilities will also include the development design and analysis documentation, technical specifications, and assembly procedures.

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.

What you'll do

  • Perform structural and thermal calculations, ranging in complexity from first principle hand calculations to FEA
  • Drive production drawing releases and revisions to meet manufacturing and assembly schedules
  • Collaborate with internal Quality, Manufacturing, Assembly, Commissioning, and Procurement teams on requirements and documentation
  • Rapidly design, test, and qualify prototypes
  • Prepare reports and presentations as requested
  • Be self-motivated and exhibit excellent problem-solving skills
  • Strive for simplicity over complexity

What we’re looking for

  • Bachelor’s degree in mechanical engineering, aerospace engineering, physics, or another relevant field
  • 8+ years of experience designing structural components in a fast-pace environment
  • Experience with CAD software (NX preferred) and analysis software (ANSYS Workbench preferred)

Essential Requirements

  • Perform activities such as typing, standing, or sitting for extended periods of time
  • Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), 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.

Get Job Alerts

Get job alerts for opportunities in Devens, Massachusetts, United States

About the role

September 8, 2025

Full Time

Company

September 8, 2025

On-site

USD 110k–185k yearly

Commonwealth Fusion Systems (CFS)

cfs.energy

  •  Devens, Massachusetts, United States

8+ years

UTC-05:00

Apply now

Job expired?

Please let Commonwealth Fusion Systems (CFS) know you found this job on Rejobs. This will help us grow and get more people to work on renewable energy!

Discover how you’re connected

View connections

See your contacts at Commonwealth Fusion Systems (CFS) on LinkedIn to leverage your network in applying for this position.

Share with Friends

The stakes are high, and the time for talk has passed. Now is the time for action. Help a friend accelerate the shift to a sustainable future.

Share this job - Senior Mechanical Engineer (m/w/d) - with your folks, and help them find a career to be proud of.