Senior/Staff Nuclear Safety Analysis Engineer

The role

This person will take technical ownership of safety analysis deliverables for the Mark 1 reactor design. They will lead intact-event safety analysis, drive source term calculations, and coordinate across design disciplines to support licensing.

What you will do

• Take end-to-end technical ownership of safety analysis deliverables for the Mark 1 reactor.
• Perform and oversee deterministic safety analysis of intact events.
• Develop source term calculations accounting for TRISO fuel behavior.
• Quantify how neutronics model uncertainties propagate into dose calculations.
• Work across design disciplines to define analysis inputs and design-basis requirements.
• Interface with the licensing team to shape application content and respond to regulator requests.
• Partner with testing and materials teams to close data gaps.
• Drive cross-team efforts to verify and validate safety analysis codes and tools.
• Author and review technical documentation for regulatory submittal.
• Provide technical mentorship to less experienced engineers.

Required qualifications

• B.S. in Nuclear, Mechanical, or a related field
• 4+ years of relevant reactor safety analysis experience, or an equivalent combination of education and experience
• Hands-on experience with at least one system-level thermal-hydraulic / systems analysis code (e.g., RELAP5-3D, TRACE, SAM, GOTHIC, SAS4A/SASSYS-1, MELCOR, or equivalent)
• Working knowledge of TRISO (or other advanced) fuel performance and qualification
• Experience developing source terms and radiological dose consequence calculations
• Ability in reactor physics / neutronics fundamentals
• Familiarity with PIRT development or comparable phenomena-scoping methods
• Technical writing skills for producing quality-affecting calculations and reports
• Ability to work independently and manage competing priorities

Nice to have

• M.S. or Ph.D.
• Probabilistic risk assessment (PRA) and its integration with deterministic analysis
• Familiarity with the DOE authorization (DOE 1271) and/or NRC licensing framework
• Experience verifying and validating (V&V) safety analysis codes and methods under a nuclear quality program
• Experience with radionuclide inventory and dose consequence software
• Exposure to TRISO or advanced fuel qualification and irradiation testing programs
• Familiarity with reactor physics / neutronics codes
• Experience authoring or defending regulatory submittals
• Prior experience at an advanced reactor developer, national laboratory, or major nuclear supplier
• Experience leading or coordinating technical work across multiple engineering disciplines, subcontractors, or vendor organizations

About the company

Antares is building mass-producible, inherently safe, deployable microreactors for terrestrial, underwater, and space use. The team includes members from SpaceX, the White House, the Pentagon, the Department of Energy, and various National Laboratories.