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Senior Salt Operations Engineer

Commonwealth Fusion SystemsDevens, Massachussets, United StatesOnsite
Commonwealth Fusion Systems (CFS) has the fastest, lowest cost path to commercial fusion energy.
CFS collaborates with MIT to leverage decades of research combined with groundbreaking new high-temperature superconducting (HTS) magnet technology. HTS magnets will enable compact fusion power plants that can be constructed faster and at lower cost. Our mission is to deploy these power plants to meet global decarbonization goals as fast as possible. To that end, 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 implement this plan, we are looking to add dedicated people to the team who treat people well, improve our work by adding multifaceted perspectives and new ways of solving problems, have achieved outstanding results through a range of pursuits, and have skills and experience related to this role.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.  ARC will strongly leverage the work that’s been done for SPARC in developing HTS magnets and other key tokamak systems. However, because of its mission to deliver power to the grid, the ARC tokamak has a few systems not included on SPARC, such as the Blanket System, which uses FLiBe to breed tritium and capture heat. The Blanket System group within R&D is a growing team that is delivering key scientific and engineering results to push the technical readiness level of these new enabling technologies higher.The Blanket System team at CFS is looking to grow the team as we expand our operations into larger-scale, FLiBe-based test loops and test articles.

The salt team is looking for a salt Operations engineer to lead practical, hands-on operations of flibe test systems. This engineer will develop best practices for safely and effectively commissioning, operating, debugging, maintaining, upgrading, and decommissioning salt systems.  The operations framework needs to be flexible enough to grow with both the physical size of the test setups and the size of the team. The Blanket System team has a strong practice of carrying engineering risk where appropriate while attentively and aggressively managing safety risk, and is looking for an engineer who will actively contribute to this culture. 

This team member will:


  • Lead operations of upcoming salt test loops at CFS, including developing end-to-end operations procedures from conception to decommissioning of a project
  • Develop workflows with safety in mind from the beginning. Lead hazard assessments and safety reviews for key operations to rigorously identify and manage safety risks
  • Ensure that operability is taken strongly into consideration over the entire design and engineering process. This includes providing operability reviews at key points in loop and test article development and synthesizing lessons learned from each test improve the next design
  • Develop workflows to record and communicate operations and performance data
  • Train operators on best practices, SOPs, etc
  • Act as a technical expert on safe salt handling practices to internal and external stakeholders 
  • Work closely with other CFS teams including:
  • Safety team to manage chemical hazards (including beryllium) in existing and new experimental facilities
  • Other R&D functions including Mechanical, I&C etc
  • ARC Design Team

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


  • BS in Chemical, Mechanical, or Nuclear Engineering or a related field
  • 7+ years of experience working with novel, hazardous, high-temperature test articles
  • Experience with molten salt systems
  • Experience developing operating procedures and plans
  • Experience with first-of-a-kind, R&D, or pilot system development
  • Ability to work effectively in a multidisciplinary team of engineers, scientists, technical staff and others
  • Ability to clearly express and critique ideas
  • Great communication and organizational skills (required)
  • Strong problem solving skills, ability to approach new problems with creativity

Additional experience and/or qualifications:


  • Experience with flibe or other fluoride salts
  • Experience leading safety reviews 
  • Experience scaling up low TRL systems
  • Experience with instrumentation and control systems in extreme environments
  • Experience with vacuum systems, hazardous gas systems, or work in irradiation environments
  • Experience with electrochemistry or analytical chemistry
  • Ability to occasionally lift up to 50 lbs
  • Perform activities such as typing, standing, and sitting, for extended periods of time
  • Work in a facility that contains industrial hazards including heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics
  • #LI-Onsite

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.Apply for this job

Life at Commonwealth Fusion Systems

The fastest path to clean, limitless fusion energy in time to make a difference. Energy use is a fundamental enabler for improved quality of life worldwide, yet historically it has come at an extreme cost to the environment. Fusion energy can change that. We aim to deploy fusion energy to the world on a timescale that will make a difference. CFS is combining proven physics backed by decades of government-funded fusion research with a revolutionary superconducting magnet technology to accelerate the path to commercial fusion energy. If you are interested in helping us bring this vision to reality, we would like to hear from you.
Thrive Here & What We Value* Mission-driven and Impact-Oriented* Collaborative and Supportive Work Environment* Emphasis on Continuous Learning and Improvement* Focus on Safety and Wellbee**ng* Commitment to Diversity and Inclusion* Experience in Optimizing Plasma Confinement Systems* Professional Organization Membership* Senior Research Engineer Experience* Global Decarbonization Goals* Value for High-Temperature Superconducting (HTS) Magnet Technology
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