Contractor - Thermal-Hydraulic Engineer (Nuclear)

Location: Remote within the contiguous United States; travel may be required for business needs.

Company

hirify.global develops small modular reactor technology and related nuclear engineering, analysis, and licensing solutions.

What you will do

• Prepare and verify VIPRE subchannel analyses, including CHF predictions and margin evaluations, using approved methods.
• Prepare and verify RELAP5 system-level thermal-hydraulic evaluations covering LOCA, non-LOCA transients, and design-basis events.
• Evaluate system designs, operating functions, and engineered safety features; recommend design modifications that preserve safety margins and plant performance.
• Lead cross-functional thermal-hydraulic reviews for reload safety analyses, plant design changes, operational concepts, licensing deliverables, and customer projects.
• Maintain licensed thermal-hydraulic methods, modeling standards, applicability ranges, and associated implementing analyses.
• Develop licensing reports, topical reports, license applications, calculations, studies, system descriptions, requirements, and other engineering documentation; support regulator interactions.

Requirements

• Bachelor’s degree in Nuclear, Mechanical, Chemical Engineering, or a related discipline from an accredited four-year institution.
• At least 8 years of full-time, directly relevant engineering experience, including subchannel thermal-hydraulics, transient analysis, and related safety analysis.
• Required experience with RELAP5.
• Experience with licensed thermal-hydraulic methods, design-basis evaluations, and interfaces with core design, fuel design, neutronics, and transient analysis.
• Ability to independently frame complex problems, develop solution strategies, execute analyses with minimal oversight, and manage uncertainty.
• Ability to provide technical leadership, mentor junior engineers, lead complex analysis tasks, and collaborate across engineering, nuclear fuels, design, code development, and operations functions.
• Understanding and implementation of quality assurance requirements under 10 CFR 50 Appendix B, 10 CFR 21, and ASME NQA-1.
• Must be eligible to work under Department of Energy 10 CFR Part 810.
• Ability to travel nationally and locally and perform required communication, computer, and office-related physical activities, with reasonable accommodation where applicable.

Nice to have

• Advanced degree in Nuclear, Mechanical, or Chemical Engineering.
• Experience translating licensed methods into alternate regulatory frameworks and adapting thermal-hydraulic methodologies to country-specific regulatory expectations.

Culture & Benefits

• 40 hours per week under a contract assignment expected to continue through 2027.
• Remote work is available within the contiguous United States, with travel as needed for business requirements.
• Work spans multiple and diverse technical areas, including urgent analyses, cross-functional reviews, troubleshooting, and special studies.
• Safety culture, quality assurance, professional communication, adaptability, and dependable execution are expected.