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Mechanical Design Engineer

Commonwealth Fusion Systems (CFS), an MIT spinout pursuing the fastest, surest way to clean, limitless fusion energy, is looking for an early-career design engineer with excellent capabilities to create CAD models of complex, integrated electro-mechanical systems.

CFS’ mission is to enable world-wide clean energy for everyone, creating a sustainable environment for current and future generations. We’ve created a credible path to an operating fusion power plant in 15 years which leverages our novel collaboration with MIT and funding from strategic and financial investors who share our vision. This begins by developing a new class of high-field superconducting magnets that will enable the SPARC tokamak to demonstrate net energy from fusion for the first time. To execute this plan, we are now looking to add talented people to the team who:

  • are mission-driven and treat people well;
  • improve our team by adding diverse perspectives and new ways of solving problems;
  • have demonstrated exceptional results through a range of different pursuits; and
  • have skillsets and experience that relate to the following role:

Mechanical Design Engineer

The CFS Mechanical Design Engineer will be responsible for the following:

  • work within a multi-disciplinary team of physicists and engineers as part of collaborative sponsored research projects at the MIT Plasma Science and Fusion Center;
  • report to the SPARC Head of 3D Design and Integration;
  • create and maintain 3D CAD models of SPARC tokamak subsystems; and
  • attend and participate in meetings where design progress is discussed, iterated, and updated.

The ideal candidate will have:

  • at least a bachelor’s degree in a relevant engineering field (e.g., mechanical);
  • have completed multiple projects on complex, 3D systems that were fielded;
  • exceptional attention to detail;
  • experience with modern, 3D design tools, especially SolidEdge;
  • familiarity with basic finite-element analysis of structural, thermal, fluid, and electrical systems;
  • knowledge of how to apply GD&T to design work;
  • a professional engineer license is preferred, but not required;
  • an ability to clearly express and critique ideas;
  • an emphasis on elegance and simplicity over complexity;
  • a drive towards commercially viable solutions;
  • a history of thriving in fast-paced, dynamic environments; and
  • values that align with our company’s values of integrity, execution, impact, and self-critique.

If you share our mission and believe you are a good fit for this position, please send a cover letter and resume to, with “Design Engineer” in the subject line.

At CFS, we deeply value diversity and are an equal opportunity employer by choice.