Thermo-Mechanical Engineer II

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 the Thermal-Mechanical Engineer for Integration of the Power Conversion System (PCS), you will own how heat moves through the Power Conversion System, including the thermal budget and its impact on hardware over time. Your scope runs from the thermal energy budget of the whole system down to the insulation on a single hot-section joint. You will develop the heat rejection and cold-sink architecture that closes the cycle, size and integrate the recuperator, define the thermal configuration of the hot section (insulation, heat-loss budget, surface temperatures, and personnel protection), and hold the thermal interfaces and transient requirements against the major PCS components, the reactor, and the safety systems. You are responsible for managing temperature-related life-limited hardware including mitigations, inspection procedures and processes, and a maintenance plan that manages that risk. You will participate in testing and data reviews for test rigs, full-scale hardware, and deployed reactors. You will drive instrumentation placement, correlate your models against w...