Cryogenic Engineer

  • Commonwealth Fusion Systems (CFS)
  • Cambridge, MA
  • Dec 31, 2020

Job Description

Commonwealth Fusion Systems (CFS) is the surest path to limitless, clean fusion energy. Our mission is to enable world-wide clean energy for everyone, creating a sustainable environment for current and future generations. We have 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 this role.
The SPARC facility will feature a large-scale cryogenic plant and cryo distribution system that will generate and deliver low-temperature gaseous helium to various subsystems of the SPARC tokamak. The cryogenics system is a critical utility for ensuring the tokamak high-temperature superconductors (HTS) meet performance requirements.

This team member will:

  • Perform calculations and analyses, build and run models, and develop design deliverables as needed to support proper design and operation of the cryogenics system during all operating modes and to facilitate integration of the cryogenics system with other SPARC systems.
  • Develop and maintain specification(s) for the design and fabrication of the cryogenics systems, soliciting feedback from others to ensure it meets the requirements of SPARC.
  • Provide technical support to selected cryogenics system vendor(s).
  • Lead the technical portion of cryogenics system design reviews.
  • Comply with CFS design control processes, providing high quality documentation.
  • Prioritize effective teamwork, e.g. maintaining a positive mindset, communicating proactively, taking initiative, and providing constructive feedback.

The ideal candidate will have most, if not all, of these requirements:

  • at least a bachelor's degree in mechanical engineering;
  • 10+ years of experience in the mechanical engineering of large-scale, integrated systems;
  • experience using the following engineering tools: ANSYS, COMSOL, 1D compressible flow code, MATLAB, Simulink;
  • experience engineering large-scale thermofluid systems, from conceptual design through field commissioning;
  • experience developing specifications for thermofluid components, e.g. blowers, tanks, control valves.
CFS team members thrive in a fast-paced, dynamic environment and have demonstrated exceptional results through a range of different pursuits. We all tightly align with our company values of integrity, execution, impact and self-critique. As we grow, we are looking to add talented people who are mission driven and bring diverse perspectives and new ways of solving problems.
At CFS, we deeply value diversity and are an equal opportunity employer by choice. We consider all qualified applicants equally for employment. We do not discriminate on the basis 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, ordinance, or regulation.

Organization Type


Organization Size




Drawdown solutions

Nuclear Power

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