# Lead, Nuclear Criticality Safety at general matter

- Company: general matter
- What the company does: Backed by Founders Fund.
- Company website: https://generalmatter.com
- Type: Startups
- Level: Senior
- Location: Los Angeles, CA
- Work setup: On-site
- Pay: $160K to $230K base salary per year (USD)
- Posted: 2026-09-01
- Apply by: 2026-10-16
- Apply: https://job-boards.greenhouse.io/generalmatter/jobs/5408593008
- Page: https://www.1752.vc/careers/jobs/general-matter-lead-nuclear-criticality-safety/

## About the role

As Lead Nuclear Criticality Safety Engineer at General Matter, you'll build and lead the criticality safety program for a Part 70 fuel cycle facility from the ground up. Your criticality safety evaluations (CSEs) are a foundational input into our Integrated Safety Analysis (ISA), meaning the double-contingency approach, methodology, and technical judgment you establish now will shape how this facility operates for decades.

## What they're looking for

- Evidence of exceptional ability (prior projects, portfolio of work, completed products, etc.)
- 8+ years of nuclear criticality safety experience, including direct authorship of criticality safety evaluations at a DOE or NRC-licensed facility
- Bachelor's degree in Nuclear Engineering, Physics, or a related field
- Strong knowledge of criticality safety regulations, standards, and methodologies (e.g., 10 CFR Part 70, ANSI/ANS-8 series), and the ability to bridge DOE and NRC frameworks where they differ
- Proficiency in computational tools such as SCALE, MCNP, or similar software
- Ability to perform trade studies and make clear recommendations using first principles and engineering fundamentals, even with partial information

Tags: Safety & Compliance