Commonwealth Fusion Systems
Molten Salt Engineer
$107K–$160K
Devens, MA · On-site · Full-time · Posted Oct 14, 2026
- Experience
- 5+ years in an R&D environment; PhD program counts.
- Education
- BS in Chemistry, Chemical, Materials or Nuclear Engineering, or a related field.
About the job
Supports molten salt experimental testing and characterization, with responsibilities expanding to experimental and test-cell design and materials projects.
What you'll do
- Set up and operate experiments; perform salt characterization, calibration, and materials testing.
- Analyze data to characterize salt quality and improve testing repeatability.
- Support in-loop testing of salt-compatible components and coordinate equipment procurement with vendors.
What they ask for
- Bachelor’s degree in Chemistry, Chemical, Materials or Nuclear Engineering, or a related field.
- 5+ years of experience in an R&D environment; a PhD program counts.
- Experience conducting R&D in a chemical laboratory and designing and analyzing experiments to improve component and system TRLs.
- Experience with hazardous-chemical safety systems; ability to meet the stated physical, safety, and occasional travel or schedule requirements.
Nice to have
- Experience with modeling tools such as Calphad, FactSage, or Comsol.
- PhD or experience in electrochemistry, radiochemistry, molten salt systems, high-temperature or corrosive systems, gas handling, or laboratory setup.
Pay
USD 107,000–160,000 per-year-salary (base salary)
Tools
Calphad, FactSage, Comsol
Model-written summary · the original posting is authoritative