Nuclear Engineer
US$120,000 – US$175,000 / yr base salary
Posted 24 Jun 2026
Advertised as “Nuclear Engineer I/II”
BranchFactor Summary
The original posting with the fluff stripped out
- Level
- I/II
- Management level
- Individual contributor
- Employment
- On-Site
- Contract
- Full-time
| Base salary | US$120,000 – US$175,000 / yr |
|---|
About Us
At Antares, our long-term mission is to make clean energy abundant from Earth to the Asteroid Belt. We’re fueled by the belief that advanced nuclear energy can strengthen our military, solve the climate crisis, elevate global living standards, and expand humanity's presence in outer space. To achieve our mission, we’re building mass-producible, inherently safe, deployable microreactors that can be used terrestrially, underwater, and in space.
The Antares team hails from SpaceX, the White House, the Pentagon, the Department of Energy, MIT, Rigetti Computing, General Atomics, Relativity Space, Ursa Major, and National Laboratories like Idaho, Oak Ridge, Los Alamos, and Savannah River. Antares has raised over $600M in venture capital from top-tier investors and has hundreds of million-dollars on contract with the military services, NASA, and the Department of Energy.
About the Role
As a member of the nuclear engineering team, you will become the responsible engineer for a key component of the Antares reactor design such as reactivity controls and instrumentation, radiation shielding, fuels, materials, thermal hydraulics, safety, or licensing. The ideal candidate has a mix of industry and academic experience, and has worked in a team-oriented environment to mature nuclear concepts. While you may have a specialty, you’re not afraid to operate as a generalist in a growing organization.
Roles and Responsibilities:
-
Assist with neutronics modeling and simulations using MCNP, Serpent, or SCALE
-
Support Multiphysics analyses (thermal-hydraulics, heat transfer, structural mechanics)
-
Participate in experimental validation of simulation results
-
Collaborate with senior engineers on iterative design tasks
-
Contribute to documentation and regulatory reporting
-
Participate in hardware demonstrations and prototype testing
Basic Qualifications:
-
Bachelor's degree in Nuclear Engineering or related technical field
-
Familiarity with neutron transport software (MCNP, Serpent, SCALE)
Preferred Skills & Experience:
-
Familiarity with Python or similar programming language
-
Coursework or internships involving Multiphysics modeling
-
Interest or experience in microreactors, heat pipe cooled reactors, or other advanced reactors
-
Exposure to fast-paced project environments
-
Proven ability to quickly learn new technical concepts