Reactor Multiphysics Methods Engineer (Griffin/MOOSE)

Idaho National Laboratory; Idaho Falls (ID); On-site; USD 79,000 - 195,000; Full time

Job summary

Idaho National Laboratory is hiring a Reactor Multiphysics Methods Developer to advance Griffin, a deterministic reactor physics code. You will develop and support multidimensional modeling within the MOOSE framework, applying C++, Fortran, and Python to solve complex reactor physics problems.

The role involves collaboration with engineers, software validation, and contributing to multi-physics analysis for advanced reactors, plus mentoring junior staff on a 9x80 schedule at the REC facility.

Qualifications

• PhD in Mathematics, Engineering, Computer Science or related field from an accredited institution.
• Experience with C++, Fortran and multi-physics modeling.
• Excellent verbal and written communication skills.
• Experience with MOOSE framework, Griffin, and Monte Carlo tools.

Responsibilities

• Develop, deploy, and support innovative technical solutions across multiple platforms.
• Apply software engineering to complex analytical processes and visualization.
• Use modeling and simulation to address nuclear, chemical, digital twins, energy delivery, and energy security applications.
• Analyze, test, and maintain models or simulation-based systems.
• Mentor junior staff and lead groups.
• Deliver high-quality product features.

Skills

C++

Fortran

Multiphysics modeling

Verbal communication

Written communication

MOOSE framework

Griffin

Monte Carlo tools

Python

MATLAB

Simulink

Julia

Education

PhD in Mathematics, Engineering, Computer Science, or related discipline

Tools

MATLAB

Simulink

Python

Julia

Job description

Idaho National Laboratory is hiring a Reactor Multiphysics Methods Developer to advance Griffin, a deterministic reactor physics code. You will develop and support multidimensional modeling within the MOOSE framework, applying C++, Fortran, and Python to solve complex reactor physics problems.

The role involves collaboration with engineers, software validation, and contributing to multi-physics analysis for advanced reactors, plus mentoring junior staff on a 9x80 schedule at the REC facility.