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Tritium Systems Engineer

Commonwealth Fusion Systems (CFS), an MIT spinout pursuing the fastest, surest way to clean, limitless fusion energy, is looking for an experienced tritium systems engineer with hands-on experience designing, building, and operating tritium gas handling 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:

Tritium Systems Engineer

Safe and effective tritium handling will be critical to our mission to demonstrate net fusion energy. The CFS Tritium Systems Engineer will report to the SPARC Head of Nuclear Engineering and 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;
  • lead the detailed design of tritium storage, injection, and processing systems for the SPARC tokamak;
  • ensure all systems that will contact or contain tritium are compatible with tritium;
  • maintain compliance with tritium licenses; and
  • attend and participate in meetings where design progress is discussed, iterated, and updated.

The ideal candidate will have:

  • experience with of tritium storage, handling, and processing systems;
  • an exceptional safety record and attention to detail;
  • at least a bachelor’s degree in a relevant engineering field (e.g., chemical, mechanical);
  • knowledge of transport phenomena and chemical processes in gasses and interaction of volatile gasses with seals, pumps, transfer lines, etc.;
  • experience with and knowledge of high to ultra-high vacuum systems and measurement techniques;
  • knowledge of tritium licensing and regulatory issues;
  • 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 “Tritium Systems Engineer” in the subject line.

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