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Fuel Fabrication Criticality Analysis & Nuclear Safety Engineer

Oklo·Idaho Falls, ID or Remote·Remote·Posted 21 October 2026

About the role

Thanks for your interest in Oklo! We are searching for a Criticality Analysis & Nuclear Safety Engineer to join our engineering team. Position Description As a Criticality Analysis & Nuclear Safety Engineer on Oklo's Fuel Fabrication team, you'll be responsible for developing and maintaining the nuclear criticality safety basis and nuclear safety analyses supporting the design, licensing, construction, commissioning, and operation of advanced nuclear fuel fabrication facilities. You'll perform computational analyses, establish engineered and administrative controls for fissile material operations, and work closely with process, mechanical, operations, licensing, and quality teams to ensure facility designs meet rigorous nuclear safety requirements. This is a highly cross-functional role where technical excellence and a collaborative mindset are equally valued. Specific responsibilities may include: Develop Criticality Safety Evaluations (CSEs) and supporting calculations. Perform criticality analyses using MCNP, SCALE, SERPENT, or equivalent software. Develop nuclear safety analyses including hazard evaluations and accident analyses. Establish fissile material limits, mass limits,…

This is a summary of the advert. The full description and the application are on Oklo's careers site.

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