Nuclear Engineer
US$160,000 – US$210,000 / yr base salary
Posted 5 Aug 2026
Advertised as “Senior Nuclear Engineer”
BranchFactor Summary
The original posting with the fluff stripped out
- Management level
- People management
- Contract
- Full-time
| Base salary | US$160,000 – US$210,000 / yr |
|---|
Field of studyNuclear Engineering, Physics (or related)
Study levelMaster's or higher
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:
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You will develop and provide expertise in a subset of the following:
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Lead complex neutronics modeling and Multiphysics analysis
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Responsible nuclear engineer for design and integration of components as assigned
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Mentor junior engineers
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Develop and implement modeling and simulation methods and tools
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Coordinate validation and verification activities
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Interface directly with regulatory bodies for licensing and compliance
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Spearhead prototype testing and experimental campaigns
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Lead cross-disciplinary integration efforts across neutronics, thermal-hydraulics, structural mechanics, materials, and reactor operations to ensure design margins are maintained across all Figures of Merit (FOMs) and safety-critical performance metrics
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Identify and define validation, verification, qualification, and testing requirements across engineering disciplines, including opportunities to leverage startup, commissioning, and power ascension testing data for model development and design maturation