[Remote] Fuel Fabrication Criticality Analysis & Nuclear Safety Engineer

Note: The job is a remote job and is open to candidates in USA. Oklo Inc. is hiring a Criticality Analysis & Nuclear Safety Engineer for its Fuel Fabrication team. The role develops and maintains nuclear criticality safety bases and nuclear safety analyses for advanced fuel fabrication facilities, performs computational analyses, and establishes controls for fissile material operations. It also collaborates with engineering, operations, licensing, and quality teams to support safe facility design and regulatory compliance.

Responsibilities

• Develop Criticality Safety Evaluations (CSEs) and supporting calculations
• Perform criticality analyses using MCNP, SCALE, SERPENT, or equivalent software
• Develop nuclear safety analyses including hazard evaluations and accident analyses
• Establish fissile material limits, mass limits, geometry controls, moderation controls, and administrative controls
• Support facility design reviews to ensure criticality-safe equipment layouts and process designs
• Work with process engineers developing HALEU, plutonium, and uranium metal processes
• Support NRC licensing documentation and responses to regulatory requests
• Participate in HAZOPs, What-If analyses, FMEAs, and design reviews
• Develop criticality alarm system requirements and safety basis documentation
• Support startup testing, operational readiness reviews, and commissioning
• Investigate abnormal conditions and recommend corrective actions
• Maintain compliance with ANSI/ANS-8 standards and applicable NRC/DOE requirements

Skills

• Bachelor's or higher degree in Nuclear Engineering or closely related discipline
• Experience performing nuclear criticality or safety analyses
• Knowledge of neutron transport methods and computational modeling
• Understanding of NRC or DOE nuclear safety requirements
• Strong technical writing and communication skills
• Ability to work effectively within multidisciplinary engineering teams
• Strong understanding of neutron physics and criticality safety principles
• Experience applying ANSI/ANS-8 standards
• Proficient with MCNP, SCALE, SERPENT, or equivalent modeling software
• Able to evaluate complex nuclear process systems and identify credible accident scenarios
• Comfortable working across engineering, operations, licensing, and quality organizations
• Excellent technical writing and presentation skills
• 3–10+ years of experience performing nuclear criticality safety or nuclear safety analyses in fuel cycle, reactor, DOE, national laboratory, or other highly regulated nuclear environments
• Only applicants who meet the definition of a U.S. person under applicable laws may be eligible
• Graduate degree in Nuclear Engineering
• Experience supporting HALEU, plutonium, or uranium fuel fabrication facilities
• Experience preparing NRC licensing analyses
• Knowledge of DOE-STD-3007 and nuclear safety basis methodologies
• Experience with HAZOPs, accident analysis, or probabilistic risk assessment
• Familiarity with NQA-1 quality programs

Benefits

• Flexible time off
• Equity
• Bonuses
• 401(k)
• Health insurance (with employer contribution)
• HSA
• FSA
• Flexible work hours
• Wellness credits
• Remote work; remote employees must travel to headquarters (Santa Clara, CA) twice a quarter annually, based on business or team needs, and be in person at headquarters for the first two weeks of onboarding

Company Overview