Commonwealth Fusion Systems
Senior Field Mechanical Engineer - Assembly - Second Shift
$134K–$205K
Devens, MA · On-site · Senior · Full-time · Posted Sep 23, 2026
- Experience
- 7+ years of Mechanical Engineering; 4+ years overseeing an in-progress construction, manufacturing, or assembly/integration process; 4+ years of CAD software experience; project ownership experience.
- Education
- B.S. in Civil, Mechanical, or Aerospace Engineering.
- Visa sponsorship
- Employment offer is contingent on compliance with U.S. Export Control Laws.
About the job
Owns and troubleshoots complex SPARC Tokamak assembly workstations, guiding technicians, resolving assembly issues, and ensuring tools, fixtures, and process changes support safe and successful construction.
What you'll do
- Own assembly sequence and workstation execution, adapting processes to fit the overall SPARC assembly sequence.
- Resolve assembly and component issues; coordinate with design teams and provide manufacturing and assembly feedback.
- Procure or build tools and fixtures, validate operations, and support hands-on assembly work.
What they ask for
- B.S. in Civil, Mechanical, or Aerospace Engineering.
- 7+ years of Mechanical Engineering experience and demonstrated project ownership.
- 4+ years overseeing an in-progress construction, manufacturing, or assembly/integration process.
- 4+ years of CAD software experience; ability to meet stated physical and onsite requirements.
Nice to have
- 3+ years of experience with Siemens NX.
- Lifting operations experience; knowledge of welding, piping, or tubing construction and joining; or experience with complex assemblies.
Pay
USD 134,000–205,000 per year (base salary)
Tools
CAD software, Siemens NX
Model-written summary · the original posting is authoritative