Commonwealth Fusion Systems
Molten Salt Engineer
$70K–$120K
Devens, MA · On-site · Full-time · Posted Sep 2, 2026
- Experience
- 0–2 years of work experience.
- Education
- Bachelor’s degree in Chemistry, Chemical Engineering, Materials Engineering, Nuclear Engineering, Mechanical Engineering, or similar field.
About the job
Supports molten-salt experimental testing and R&D, including corrosion and device testing, test-cell development, lab upkeep, and safe chemical-handling procedures.
What you'll do
- Perform corrosion and device testing in molten salts.
- Design and build test cells for molten-salt R&D; assist with laboratory maintenance.
- Write and modify SOPs for safe handling of hazardous chemicals, including fluoride salts (FLiBe).
What they ask for
- Bachelor’s degree in Chemistry, Chemical Engineering, Materials Engineering, Nuclear Engineering, Mechanical Engineering, or a similar field.
- Experience with R&D work in a chemical or engineering laboratory.
- Experience working with safety systems for hazardous chemicals.
- Ability to occasionally lift up to 50 lbs; willingness to travel or work occasional nights, weekends, or on-call.
Nice to have
- High-temperature chemistry, molten salts, electrochemistry, or ceramics.
- Python, MATLAB, or equivalent for data analysis; building and commissioning laboratory equipment; CAD software.
Pay
USD 70,000–120,000 per-year-salary (base salary)
Tools
molten salts, FLiBe, Python, MATLAB, CAD software
Model-written summary · the original posting is authoritative