Computational Fusion Neutronics Engineer

Socket.dev; Kearny (NJ); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Health benefits

Employee equity stock options

20 days PTO

Competitive salary

Job summary

Thea Energy is seeking a Computational Nuclear Engineer to advance neutronics and multiphysics simulations for stellarator fusion systems. You’ll work with minimal supervision on cutting-edge research to ensure safety and performance of the reactor designs.

The ideal candidate has a PhD or Master’s in a related field with substantial experience in Monte Carlo transport codes, Python, C++, and multiphysics coupling. Collaboration across disciplines is essential in our startup environment.

Qualifications

• PhD in Nuclear Engineering or Computational Physics with 2+ years of experience, or a Master’s with 4+ years.
• Strong knowledge of Monte Carlo radiation transport codes (OpenMC, MCNP, Serpent).
• Proficiency in Python and C++.
• Experience with multiphysics coupling frameworks (MOOSE, Cardinal, NekRS).
• Familiarity with HPC and parallel programming (MPI/OpenMP).

Responsibilities

• Develop high-fidelity neutronics and multiphysics simulations in 3D stellarator geometries.
• Simulate fusion blanket performance, TBR, energy deposition, activation, and shielding.
• Perform multiphysics coupling to refine reactor designs.
• Conduct dose rate calculations and optimize shielding for safety and equipment.
• Prepare technical reports, presentations, and publications from simulation results.

Skills

Python

C++

Monte Carlo methods

Team collaboration

Communication

Analytical thinking

Education

PhD in Nuclear Engineering/Computational Physics

Master's degree in related field

Tools

OpenMC

MCNP

Serpent

MOOSE/Cardinal/NekRS

Git/GitHub/CI

NJOY

Job description

Thea Energy is seeking a Computational Nuclear Engineer to advance neutronics and multiphysics simulations for stellarator fusion systems. You’ll work with minimal supervision on cutting-edge research to ensure safety and performance of the reactor designs.

The ideal candidate has a PhD or Master’s in a related field with substantial experience in Monte Carlo transport codes, Python, C++, and multiphysics coupling. Collaboration across disciplines is essential in our startup environment.