Nuclear Safety Software Engineer (Fortran/Python)

Search Jobs - INL Professional Careers; Idaho Falls (ID); On-site; USD 79,000 - 195,000; Full time

Benefits offered by this job

9x80 Schedule

Every Other Friday Off

Job summary

Idaho National Laboratory is seeking a Modeling & Simulation Professional to join the Reactor Systems and Heat Transport team. The role focuses on modernizing RELAP5-3D capabilities, improving code quality, and integrating new features across a nuclear safety software platform.

The ideal candidate will perform thermal hydraulic analysis and contribute to strategic planning, with a 9x80 schedule at the REC facility and every other Friday off.

Qualifications

• BS in Mathematics, Engineering, Computer Science or related discipline.
• Advanced degree preferred for higher level postings.
• Strong communication skills (verbal and written).
• Export control status restricts eligibility (US Citizen or Green Card).

Responsibilities

• Update legacy Fortran code to modern standards and structure.
• Refactor complex routines; improve inline documentation.
• Develop new features in Fortran; write Python scripts.
• Apply automated documentation systems for updates.
• Submit code via pull requests to repository.
• Participate in IRUG meetings and collaborate with partners.
• Perform thermal hydraulic analysis using RELAP5-3D or other tools.
• Support strategic planning and performance reviews for long-term goals.

Education

Bachelor of Science in Mathematics, Engineering or Computer Science

Advanced degree in Mathematics, Engineering, Computer Science

Tools

RELAP5-3D

Fortran

Python

Job description

Idaho National Laboratory is seeking a Modeling & Simulation Professional to join the Reactor Systems and Heat Transport team. The role focuses on modernizing RELAP5-3D capabilities, improving code quality, and integrating new features across a nuclear safety software platform.

The ideal candidate will perform thermal hydraulic analysis and contribute to strategic planning, with a 9x80 schedule at the REC facility and every other Friday off.