Nuclear and Radiological Engineer

Cambridge, MA /
Tokamak Team /
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 & 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.

Commonwealth Fusion Systems is looking for a Nuclear and Radiological Engineer with at least 2 years of experience. We are designing and building the SPARC tokamak. There are a variety of nuclear and radiological engineering challenges that will require mitigation and optimization that will be informed by simulation and measurement.

This team member will:

    • perform nuclear and radiological simulations with codes like MCNP, dagMC and openMC;
    • use, maintain and implement state-of-the-art computational tools and data sets;
    • contribute to permit and regulatory reports;
    • work under a QA program; and
    • 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 (PSFC).

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

    • experience with nuclear engineered systems;
    • proficiency with tools for radiation transport, especially MCNP and dagMC;
    • skills in several of the following: Python, FORTRAN, C++, Linux;
    • experience with build systems, cmake, virtual machines, and compiling from scratch;
    • ability to learn and use codes like openMC, R2S, FISPACT, ALARA, SCALE, Cinder, and NJOY;
    • ability to prepare CAD-based model inputs;
    • ability to visualize and present data with tools like QT, VisIt, ROOT, and Excel;
    • ability to prepare cross section libraries for transport calculations;
    • an exceptional safety record and attention to detail;
    • at least a Master’s degree in a relevant engineering field (e.g., nuclear, health physics);
    • 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;
    • a team player mindset, constantly using shared mission to guide actions; and

    • personal values that complement our company’s values:
    • Integrity – Do the right thing. Build trust. Commit to the team and the ideal. Treat others as you want to be treated.
    • Execution – Get things done. Refuse to stagnate or go slow. Drive towards delivery, with speed.
    • Impact – Work towards the common good. Be the change we want in the world. Keep the mission front and center.
    • Self-Critique – Be humble. Welcome feedback. Question the status-quo. Cherish diversity of backgrounds.
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.