Engineer jobs in United States

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Fuel Fabrication Criticality Analysis, Nuclear Safety Engineer

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Posted: 10/21/2026
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Oklo Inc

Fuel Fabrication Criticality Analysis, Nuclear Safety Engineer

Oklo Inc
Posted 10/21/2026full-timeUnited StatesMid-LevelSenior💰 $120,000 - $190,000 per yearWebsite
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Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in nuclear criticality safety and safety analyses, with proficiency in computational modeling and regulatory compliance. Capable of collaborating across multidisciplinary teams to develop and maintain safety bases and analyses for advanced nuclear fuel fabrication facilities.

Highest-signal resume keywords
Nuclear Criticality Safety AnalysisMCNP, SCALE, SERPENT Software ProficiencyNRC Licensing DocumentationNeutron Physics UnderstandingANSI/ANS-8 Standards Application

About the role

Key responsibilities & impact
  • Develop and maintain the nuclear criticality safety basis and nuclear safety analyses supporting the design, licensing, construction, commissioning, and operation of advanced nuclear fuel fabrication facilities
  • Perform computational analyses
  • Establish engineered and administrative controls for fissile material operations
  • Collaborate with process, mechanical, operations, licensing, and quality teams
  • Develop Criticality Safety Evaluations 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 for 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

Requirements

What you’ll need
  • Bachelor's or higher degree in Nuclear Engineering or closely related discipline
  • 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
  • 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
  • Proficiency with MCNP, SCALE, SERPENT, or equivalent modeling software
  • Ability to evaluate complex nuclear process systems and identify credible accident scenarios
  • Comfort working across engineering, operations, licensing, and quality organizations
  • Excellent technical writing and presentation skills
  • Passion for clean energy and advanced fission
  • Comfort in a fast-paced startup environment
  • Creative, detail-oriented, and committed to nuclear safety culture
  • U.S. person eligibility may be required under applicable U.S. export control laws
  • Successful completion of a drug screening may be required; employees may be subject to drug testing
  • Bonus qualifications include a graduate degree, experience with HALEU, plutonium, or uranium fuel fabrication facilities, NRC licensing analyses, DOE-STD-3007, HAZOPs, accident analysis, probabilistic risk assessment, and NQA-1 quality programs

Benefits

Comp & perks
  • Flexible time off
  • Equity
  • Bonuses
  • Competitive pay
  • 401(k)
  • Health insurance with employer contribution
  • HSA
  • FSA
  • Flexible work hours
  • Wellness credits
  • Travel to headquarters for remote employees twice a quarter based on business or team needs
  • Company team meetings, off-sites, and other company events or gatherings
  • Employment may include drug screening and drug testing in accordance with company policy and applicable laws

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Computational ModelingCriticality Safety EvaluationsHazard EvaluationsAccident AnalysesFissile Material Operations ControlsNeutron Transport MethodsComplex Nuclear Process EvaluationSafety Basis DocumentationDesign Review ParticipationOperational Readiness Reviews
Soft Skills
Technical WritingCommunication SkillsTeam CollaborationDetail-OrientedCreative Problem Solving
Industry Keywords
Nuclear EngineeringFuel CycleRegulatory ComplianceHALEUPlutoniumUraniumDOE-STD-3007HAZOPProbabilistic Risk AssessmentNQA-1 Quality Programs