Skip to content

Thermal-Structural Engineer

Commonwealth Fusion Systems (CFS), an MIT spinout pursuing the fastest, surest way to clean, limitless fusion energy, is looking for an early career engineer with experience in thermal and structural modeling and testing of components under extreme thermal loads.

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. We are developing a new class of high-field superconducting magnets that will enable our prototype SPARC project 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 & 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:

Thermal-Structural Engineer

The SPARC tokamak will expose its plasma-facing surfaces to heat fluxes greater than any other fusion experiment to date, easily exceeding those seen in rocket nozzles and the surface of the sun. Careful engineering and qualification of this high heat flux “armor” will be crucial to the mission of SPARC.

The Thermal-Structural Engineer will:

  • work within a multi-disciplinary and proven team of top MIT physicists and engineers as part of sponsored research projects in collaboration with the MIT Plasma Science and Fusion Center (PSFC);
  • collaborate with boundary plasma physicists on specifying the thermal and electromagnetic mechanical loads on the plasma-facing surfaces;
  • develop engineering concepts for plasma-facing components (i.e., divertor, limiter, and first wall);
  • identify and work with material suppliers; and
  • test designs in pulsed, high heat flux facilities.

The ideal candidate will have:

  • at least a master’s degree in a relevant engineering field (mechanical) or equivalent industrial experience;
  • expertise in coupled heat transfer in solids and thermally-induced stress problems (aero/astro thermal protection systems, fusion first walls, arc furnaces, petroleum engineering, etc.);
  • a background in theoretical and computational thermodynamics and mechanics of materials;
  • experience with advanced constitutive modeling to capture irreversible microstructural evolution in a finite-element framework;
  • generated custom user materials in finite element packages (Abaqus, ANSYS, LS-DYNA, COMSOL);
  • knowledge of cyclic thermal fatigue issues in refractory metals (tungsten, molybdenum) and/or carbon;
  • experience in simulating transient electromagnetic loads as well as engineering vacuum-compatible components are pluses;
  • familiarity in applying ASME, ASTM, and other mechanical standards to design solutions;
  • designed and performed experiments to test engineering models;
  • 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 environment; 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 “Thermal-Structural Engineer” in the subject line.

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