Materials Engineer - Metallurgy

Antares Nuclear · Los Angeles

Mechanical & AerospaceReactor Hardware EngineeringFullTime

Antares Nuclear is hiring a Materials Engineer - Metallurgy in Los Angeles, California (full-time). Posted 16 September 2026. Apply directly on Antares Nuclear's own careers site — no account needed.

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 Materials Engineer you will aid in the development and qualification of all materials in Antares’ reactor systems. This will consist of developing experiments, processes, and quality control as well as working with vendors and collaborators to identify and rectify critical gaps in material behavior at our operating conditions. This position requires the ability to learn quickly and develop a deep understanding of a wide range of materials – including ceramics and metallic alloys – such that you become the go-to subject matter expert at the company. The ideal candidate will apply fundamental knowledge of materials science to the practical applications of manufacturing in a fast-paced environment while also pushing innovation for the next generation of materials – driving Antares to be a recognized leader in nuclear materials.

 

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Location

Culture

At Antares, we like to specifically tie each role to our founding document’s set of values–here are the top five cultural values we think you should believe at your core to be successful:

Equal Opportunity

Antares is an Equal Opportunity Employer. Employment decisions are based solely on merit, competence, and qualifications, without regard to race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability, or any other legally protected status.

ITAR Requirements

To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here.

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