Fuel Fabrication Criticality Analysis & Nuclear Safety Engineer (Nuclear Safety)

Location: Idaho Falls, ID or remote. Remote employees must travel to the Santa Clara, CA headquarters twice a quarter based on business or team needs; the first two weeks of onboarding are in person at headquarters. Only applicants who meet the definition of a U.S. person under applicable export control laws may be eligible.

Salary: $120,000–$190,000 annually.

Company

hirify.global is a startup developing fast fission power plants, nuclear fuel recycling technologies, and a domestic supply chain for critical radioisotopes.

What you will do

• Develop Criticality Safety Evaluations, supporting calculations, nuclear safety analyses, hazard evaluations, and accident analyses.
• Perform criticality analyses using MCNP, SCALE, SERPENT, or equivalent software.
• Establish fissile material, mass, geometry, moderation, engineered, and administrative controls.
• Support facility design reviews, criticality-safe equipment and process designs, criticality alarm requirements, and nuclear safety basis documentation.
• Work with process engineers on HALEU, plutonium, and uranium metal processes and collaborate with process, mechanical, operations, licensing, and quality teams.
• Support NRC licensing, regulatory responses, HAZOPs, What-If analyses, FMEAs, startup testing, operational readiness reviews, commissioning, and corrective actions.

Requirements

• Bachelor’s or higher degree in Nuclear Engineering or a 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, with a strong understanding of neutron physics and criticality safety principles.
• Knowledge of neutron transport methods and computational modeling; proficiency with MCNP, SCALE, SERPENT, or equivalent modeling software.
• Understanding of NRC or DOE nuclear safety requirements and experience applying ANSI/ANS-8 standards.
• Ability to evaluate complex nuclear process systems, identify credible accident scenarios, and maintain compliance with applicable nuclear safety requirements.
• Strong technical writing, presentation, and communication skills.
• Ability to work effectively across multidisciplinary engineering, operations, licensing, and quality organizations.
• Self-direction, creativity, attention to detail, and commitment to nuclear safety culture.

Nice to have

• 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.

Culture & Benefits

• Startup environment with a fast pace, limited hierarchy, autonomy, and open-ended problem solving.
• Collaborative, cross-disciplinary culture centered on collaboration, humility, ownership, and pathfinding.
• Flexible time off, flexible work hours, wellness credits, and remote-work flexibility.
• Equity, bonuses, competitive pay, 401(k), employer-contributed health insurance, HSA, and FSA.
• Employment may be contingent upon successful completion of a drug screening, with possible testing during employment in accordance with company policy and applicable laws.