Thea Energy
Computational Nuclear Engineer
$120K–$180K
Kearny, NJ · On-site · Full-time · Posted Aug 19, 2026
- Experience
- PhD with 2+ years of experience, or a Master’s degree with 4+ years of experience.
- Education
- PhD in Nuclear Engineering, Computational Physics, Applied Physics, or a related field; or a Master’s degree in a relevant field.
About the job
Develops neutronics and multiphysics simulations to assess and optimize the safety and performance of stellarator fusion systems.
What you'll do
- Build workflows for high-fidelity neutronics and multiphysics simulations in complex 3D stellarator geometries, including blanket performance and radiation shielding.
- Couple neutronics simulations with thermal-hydraulics or structural analysis to refine reactor designs.
- Prepare technical reports, presentations, and publications on simulation results and optimization findings.
What they ask for
- Strong knowledge of Monte Carlo radiation transport codes, such as OpenMC, MCNP, or Serpent.
- Proficiency in Python and C++.
- Proficiency in software development practices such as git, GitHub, and CI.
- Experience with multiphysics coupling frameworks such as MOOSE, Cardinal, or NekRS.
Nice to have
- Experience with nuclear data processing and libraries, or deterministic neutron transport solvers.
- Familiarity with HPC and parallel programming; machine learning experience in nuclear simulations or data handling is also listed as preferred.
Pay
$120,000-$180,000 USD base salary
Tools
OpenMC, MCNP, Serpent, Python, C++, git, GitHub, CI
AI focus
Preferred background applying machine learning to optimize nuclear simulation results or data handling.
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