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Mechanical Design Engineer - Plant Piping Systems

General Matter - Los Angeles, CA

Posted Feb 18, 2026

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About this role

Mechanical Design Engineer - Plant Piping Systems Los Angeles, CA About the Company General Matter is enriching uranium in America. Our goal is to design, build, and operate the world's lowest-cost enrichment services in the United States. Our mission is to restore America's ability to produce nuclear fuel-fuel that will power AI, advanced manufacturing, critical industries, and the next generation of nuclear reactors. Ultimately, our work will help power national ambitions and enable a high-energy society. We were incubated by Founders Fund, like Anduril and Palantir before us, and are backed by top-tier investors. Our lean, world-class team of engineers and operators is applying a first-principles approach to solving the problem of nuclear fuel production. We are a mission-driven company with a culture of urgency, accountability, and transparency. Help us build a high-energy society by making the cleanest, safest form of baseload energy the most affordable. Mechanical Design Engineer - Plant Piping Systems General Matter is seeking a Mechanical Design Engineer to transform conceptual process designs into fully engineered systems for a large-scale nuclear enrichment facility. This role focuses on detailed mechanical design, including piping systems, component selection, and structural analysis, ensuring that complex process architectures are realized safely and reliably. The ideal candidate will combine expertise in mechanical engineering fundamentals with experience in high-hazard or industrial plant environments, delivering robust solutions for advanced nuclear energy production. Responsibilities - Translate P&IDs and process architecture outputs into detailed mechanical designs for piping and equipment systems. - Perform component sizing and selection

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