# Mechanical Engineer, RF Systems at Commonwealth Fusion Systems (CFS)

- Company: Commonwealth Fusion Systems (CFS)
- What the company does: The world's largest and leading commercial fusion energy company. Backed by Khosla.
- Company website: https://cfs.energy/
- Type: Startups
- Level: Mid level
- Location: Devens, MA
- Work setup: On-site
- Pay: $90K to $145K base salary per year (USD)
- Posted: 2026-09-23
- Apply by: 2026-11-07
- Apply: https://jobs.lever.co/cfsenergy/acc12e64-d16d-4fa1-bc01-c818f6eccde6
- Page: https://www.1752.vc/careers/jobs/commonwealth-fusion-systems-cfs-mechanical-engineer-rf-systems/

## About the role

This role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively, “Export Control Laws"). Any offer of employment will be contingent on the need for compliance with such Export Control Laws.

## What they're looking for

- Bachelor’s degree in Mechanical Engineering, Physics, or a related field
- 5+ years of hands-on mechanical design experience in industrial, heavy machinery, high-power electronics, electric vehicle, or aerospace environments
- Demonstrated experience as the primary creator and owner of mechanical design architectures, operating as a core design engineer
- Direct experience performing structural loads analysis and thermal analyses to validate mechanical designs
- High proficiency in 3D CAD software and creating detailed manufacturing drawings utilizing GD&T standards
- Possess a strong fundamental understanding of heat transfer, structural mechanics, and fluid dynamics

Tags: Electrical Engineering