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General Matter

Lead, Nuclear Criticality Safety

General Matter · Los Angeles, CA

Posted 15 days ago · $160,000–$230,000

or apply directly on General Matter's site. We never take the application ourselves.

Is this posting real?

This role has been open
15 days
General Matter's roles stay open a median of 43 days
Reposted
No
Salary listed
Yes
99% of General Matter's roles list one
Ghost-job risk at General Matter
high
65 stale, 1 reposted of 133 open
Hiring momentum
151 roles opened in the last 90 days
↑ up vs. the prior 90 days
Last confirmed on the employer's board
2026-09-17

Measured from postings appearing on and disappearing from General Matter's own greenhouse board since 2026-08-03. Full hiring picture for General Matter.

About this role

As the Lead Nuclear Criticality Safety Engineer at General Matter, you will establish and lead the criticality safety program for a new Part 70 fuel cycle facility. Your role involves developing criticality safety evaluations, ensuring compliance with NRC and DOE regulations, and mentoring other engineers. You will also serve as the primary technical contact during licensing interactions and collaborate with various teams to implement safety measures.

Our read on this posting4.2out of 5
benefits
2/5
freshness
4/5
career value
5/5
role clarity
5/5
pay transparency
5/5

Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of General Matter as an employer.

What you need

  • 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)
  • 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
  • Strong verbal and written communication skills

Nice to have

  • Direct experience standing up or significantly revising a criticality safety program at an NRC-licensed Part 70 facility
  • DOE weapons complex or national laboratory experience
  • Certification as a Nuclear Criticality Safety Engineer (e.g., ANSI/ANS-8.24)
  • Professional Engineer (PE) license, or ability to obtain one
  • Advanced degree in Nuclear Engineering, Physics, or a related field

What you get

  • Base salary range of $160,000–$230,000 annually
  • Eligibility for long-term incentives, in the form of stock options
  • Access to medical, vision & dental coverage
  • Access to a 401(k) retirement plan

Worth weighing

  • No specific mention of work-life balance or flexibility in hours, though extended hours and weekends may be required
  • The role involves building a program from scratch, which may come with significant challenges and responsibilities
  • The salary range is broad and may vary based on individual qualifications and market conditions

Summarised from General Matter's posting. Read the full original.

Listed by General Matter on their greenhouse job board, last confirmed open on 2026-09-17. PitchMeAI is not the employer.

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