Nuclear Analysis Engineer (Sodium-Cooled Reactors)

Location: On-site in Austin, Texas; candidates must be based in the United States. Applicants must be U.S. Citizens or U.S. Persons in compliance with 10 CFR Part 810 and may not hold non-compliant foreign citizenships.

Salary: Competitive salary based on technical level.

Company

hirify.global develops factory-fabricated, sodium-cooled microreactors designed to provide scalable, reliable, and affordable nuclear power.

What you will do

• Perform neutronics and reactor physics analyses for advanced reactor core design, evaluation, and optimization.
• Develop three-dimensional reactor models using Monte Carlo transport tools such as Serpent, MCNP, OpenMC, and SCALE.
• Evaluate criticality, neutron flux and power distributions, power peaking, control rod worth, shutdown margin, reactivity, kinetics, and feedback effects.
• Perform fuel depletion, fuel cycle, activation, decay heat, radiation source term, and shielding analyses.
• Couple neutronics models with thermal-hydraulics, fuel performance, and thermo-mechanical analysis tools.
• Prepare technical reports and communicate methods, assumptions, uncertainties, limitations, and design implications for reviews and licensing activities.

Requirements

• Bachelor’s degree in Nuclear Engineering, Physics, Mechanical Engineering, or a closely related technical discipline.
• At least 5 years of experience performing reactor physics or neutronics analyses for nuclear reactor systems.
• Strong knowledge of neutron transport, reactor physics, criticality, and nuclear engineering fundamentals.
• Experience with continuous-energy Monte Carlo methods and deterministic reactor physics methods or tools.
• Proficiency in Python for engineering analysis, automation, scientific computing, or data processing.
• Must be based in the United States and willing to work on-site in Austin, Texas; U.S. Citizenship or U.S. Person status is required.

Nice to have

• Master’s degree or Ph.D. in Nuclear Engineering or a related field.
• 10+ years of experience in reactor physics, core design, or nuclear analysis.
• Experience with production neutronics tools including Serpent, MCNP, OpenMC, SCALE/KENO, Griffin, or DIF3D.
• Experience with advanced thermal-spectrum or sodium-cooled reactor systems.
• Experience with AI tools, NQA-1-compliant software quality assurance, software qualification, or commercial-grade dedication.

Culture & Benefits

• Fast-paced engineering environment focused on difficult technical problems and practical, rigorous analysis.
• Collaborative work across fuel design, thermal-hydraulics, safety analysis, mechanical design, manufacturing, testing, and licensing.
• Health, dental, and vision insurance.
• Paid time off.
• Corporate gym membership and opportunities for professional growth.