Criticality Safety Analyst
Listed on 2026-10-22
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Engineering
Safety Engineer, Regulatory Compliance Specialist
What You Will Do
Los Alamos National Laboratory (LANL) is a premier national security science laboratory operated by Triad National Security, LLC, for the U.S. Department of Energy's National Nuclear Security Administration (NNSA). Our mission is to solve national security challenges through scientific excellence, and our Criticality Safety team plays a vital role in ensuring the safe handling, storage, and processing of fissile materials across the Laboratory's nuclear facilities.
LANL is seeking qualified Criticality Safety Analysts at the Level 4 (Senior) or Level 5 (Expert/Principal) to join our Nuclear Criticality Safety program. These analysts provide technical expertise supporting operations involving special nuclear material (SNM) at facilities such as the Plutonium Facility (PF-4), Chemistry and Metallurgy Research (CMR) Building, and Technical Area 55 (TA-55).
This position will be filled at either the Criticality Safety Analyst 4 or 5 level, depending on the skills and experience of the selected candidate. Additional job responsibilities (outlined below) will be assigned if the candidate is hired at the higher level.
Criticality Safety Analyst 4 ($153,600 - $266,500)- Develop, review, and approve Nuclear Criticality Safety Evaluations (NCSEs) in support of operations handling fissile materials
- Perform criticality safety calculations using MCNP and other Monte Carlo transport codes
- Establish criticality safety limits, double-contingency analyses, and administrative/engineered controls
- Support Documented Safety Analyses (DSA), Technical Safety Requirements (TSRs), and Unreviewed Safety Question (USQ) determinations
- Conduct facility walkdowns, operational readiness reviews, and support DOE/NNSA assessments
- Collaborate with facility operations, nuclear safety, and criticality safety engineering staff
In addition to what was outlined at the lower level, at the higher level you will also be expected to:
- Lead complex, high-consequence criticality safety analyses; mentor and provide technical oversight to junior/senior analysts; represent LANL in interactions with DOE/NNSA and external technical review boards; contribute to criticality safety program development and continuous improvement initiatives
Job Requirements:
Criticality Safety Analyst 4 (Senior Analyst)
- Demonstrated proficiency with MCNP, SCALE, or equivalent criticality codes
- Strong working knowledge of ANSI/ANS-8 series standards and DOE Order 420.1C
Education/
Experience:
Position requires a Bachelor's Degree in Nuclear Engineering, Nuclear Physics or related discipline from an accredited institution and 10 years of related experience; or, an equivalent combination of education and experience directly related to the occupation.
- Demonstrated leadership in criticality safety program development, code validation, or benchmarking
- Experience interfacing directly with DOE/NNSA and external regulatory/safety boards
Education/
Experience:
Position requires a Bachelor's Degree in Nuclear Engineering, Nuclear Physics or related discipline from an accredited institution and 15 years of related experience; or, an equivalent combination of education and experience directly related to the occupation.
This position is subject to DOE Order 426.2, Personnel Selection, Training, and Qualification Requirements for DOE Nuclear Facilities. This DOE Order establishes entry-level requirements to ensure employees in the positions can successfully perform the requirements of the job. DOE 426.2 requires a BS degree, 2 years of job related experience and 1 year of non-reactor nuclear experience for technical support personnel who perform work independently at nuclear facilities.
For those being considered at the lower level, the 1 year of non-reactor nuclear experience can be obtained with on-the-job training if the candidate is otherwise qualified under the DOE Order.
Qualifications:
- Advanced degree in Nuclear Engineering or Health Physics
- Experience with LANL-specific or DOE complex-wide criticality safety programs
- History of technical publications or presentations (ANS, ICNC, etc.)
- Experience mentoring junior analysts or leading technical teams
The work location for this position is onsite and located in Los Alamos, NM. All work locations are at the discretion of management.
Position Commitment:Regular appointment employees are required to serve a period of…
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