Commonwealth Fusion Systems
Subassemblies Specialist
$107K–$160K
Devens, MA · On-site · Full-time · Posted Sep 30, 2026
- Experience
- 5–7 years in a highly technical assembly role; 2 years leading a team of four people or more.
- Education
- High school diploma or equivalent experience.
About the job
Build and test precision, ultra-high-vacuum subassemblies for the SPARC Tokamak, then transition to installing them in the machine.
What you'll do
- Build subassemblies and components to cleanliness and quality specifications; perform helium leak checks and other testing.
- Oversee contract technicians and work with scientists and engineers to refine work instructions and component designs.
- Support precision alignment and installation, maintain clean-room standards, and help resolve field non-conformances.
What they ask for
- High school diploma or equivalent experience.
- 5–7 years in a highly technical assembly role.
- 2 years leading a team of four or more people.
- Ability to operate a forklift.
Nice to have
- Welding experience.
- Knowledge of clean-room best practices, cryogenic systems, or six sigma process.
Pay
USD 107,000–160,000 per-year-salary (base salary)
Tools
helium leak checking, JIRA, Manufacturo, lathe/mill
Model-written summary · the original posting is authoritative