Commonwealth Fusion Systems
Senior Field Mechanical Engineer - Assembly
$134K–$205K
Devens, MA · On-site · Senior · Full-time · Posted Apr 15, 2026
- Experience
- 7+ years of Mechanical Engineering experience; 4+ years overseeing an in-progress construction, manufacturing, or assembly/integration process; 4+ years of CAD experience. Bonus: 3+ years with Siemens NX.
- Education
- B.S. in Civil, Mechanical, or Aerospace Engineering.
About the job
Owns and improves SPARC Tokamak assembly workstations by guiding technicians, resolving assembly problems, providing tools and fixtures, and coordinating with design and adjacent teams.
What you'll do
- Own the assembly sequence for assigned workstations, initially Toroidal Field Coil semicircle sub-assemblies, and define solutions for new work scope.
- Resolve fit, method, handling, and non-conformance issues; provide manufacturing and assembly feedback to design teams.
- Procure or build tools and fixtures, support hands-on assembly, and collaborate with production technicians and adjacent teams.
What they ask for
- B.S. in Civil, Mechanical, or Aerospace Engineering.
- 7+ years of Mechanical Engineering experience demonstrating project ownership.
- 4+ years overseeing an in-progress construction, manufacturing, or assembly/integration process.
- 4+ years of experience with CAD software.
Nice to have
- 3+ years of experience with Siemens NX.
- Experience with lifting operations, welding, piping and tubing, complex or delicate assemblies, tightly packaged spaces, dynamic builds, or alignment and positioning fixtures.
Pay
USD 134,000–205,000 per year (base salary)
Tools
CAD, Siemens NX
Model-written summary · the original posting is authoritative