# R&D Test Engineer 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: $107K to $160K base salary per year (USD)
- Posted: 2026-11-04
- Apply by: 2026-12-19
- Apply: https://jobs.lever.co/cfsenergy/7a641009-084b-4331-bf04-f4e28de7eaf5?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/commonwealth-fusion-systems-cfs-r-and-d-test-engineer/

## About the role

Identify and mitigate safety hazards associated with test equipment and test plans Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- Bachelor's degree in engineering or science field is required, mechanical engineering, electrical engineering or similar applied physics degree
- 1+ years using CAD software to design electromechanical assemblies
- Proven understanding of mechanical loading, failure modes, and material strength including fasteners design and bolted joints
- An understanding of how mechanical engineering fundamentals support complex design maturation including but not limited to tolerancing, GD&T, form/fit/function, material selection, DFM, and DFA
- A solid grasp of electromagnetic fundamentals – voltage, current, resistance, Ohm’s Law, AC/DC, right-hand rule, solenoids, etc
- Proven troubleshooting/problem-solving skills with an ability to innovate creative solutions to challenging problems

Tags: R&D Test

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/commonwealth-fusion-systems-cfs-r-and-d-test-engineer/