Commonwealth Fusion Systems (CFS) has the fastest, lowest cost path to commercial fusion energy.

CFS is collaborating with MIT to leverage decades of research combined with new groundbreaking high-temperature superconducting (HTS) magnet technology. HTS magnets will enable compact fusion power plants that can be constructed faster and at lower cost. The mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. CFS has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by the world’s leading investors, CFS is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. To execute this plan, we are 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 skill sets and experience that relate to this role.

ARC will be the first machine to produce electricity from fusion energy, serving as the cornerstone to a new industry. The blanket of ARC will likely be FLiBe, a high temperature molten salt suitable for tritium breeding in a deuterium-tritium nuclear environment. The ARC molten salt systems will be comprised of a large tank of FLiBe surrounding the plasma vacuum vessel, a distribution system comprised of pipes, valves, and pumps, a chemistry/purification control system, and a heat exchanger. The Molten Salt Expert will be responsible for identifying and managing the technology gaps and risks for the ARC molten salt systems.

This team member will:

- Identifying the technology gaps and risks for the ARC molten salt system
- Working with CFS R&D and Open Innovation to identify and execute on opportunities to close gaps and retire risks
- Collaborate closely with ARC engineers on molten salt system requirements

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

- PhD in Chemical Engineering, Materials Science, Nuclear Engineering, or related field
- 7 years working with high-temperature molten salt systems
- High-temperature molten salt chemistry challenges
- Molten salt equipment (e.g., pumps, sensors, valves, heat exchangers, etc.)
- Use of molten salt in a nuclear environment
- Corrosion and compatibility requirements for structural and other materials

Additional preferred experience and/or qualifications:

- Hands-on experience with FLiBe molten salt systems
- Design, installation, and scale up of test loops for component QA/QC
- Ability to perform activities such as typing and sitting for extended periods of time
- Willingness to do occasional travel

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.