# Molten Salt 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: 2026-10-14
- Apply by: 2026-11-28
- Apply: https://jobs.lever.co/cfsenergy/1cc2df24-4ac5-457b-bf6c-04eeba54c6bc?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/commonwealth-fusion-systems-cfs-molten-salt-engineer-2/

## About the role

Salt chemistry is a critical driver of corrosion, hydrogen speciation, and material behavior under irradiation. As the Blanket System team scales up to larger systems, maintaining precise control over salt chemistry is vital. We are seeking an entry-level Molten Salt Engineer to support our experimental testing operations. Initially, you will focus on executing standard operating procedures (SOPs), conducting routine materials testing, and maintaining rigorous quality controls. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- BS in Chemistry, Chemical, Materials or Nuclear Engineering or a related field
- 5+ years of experience in an R&D environment (PhD program counts)
- Experience with R&D work in a chemical laboratory
- Experience in experimental design and analysis with the explicit goal of driving to higher component and system TRLs
- Experience working with safety systems for hazardous chemicals
- Experience with modeling tools, such as Calphad, FactSage, Comsol, or similar (preferred, not required)

Tags: Technology Development

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/commonwealth-fusion-systems-cfs-molten-salt-engineer-2/