Senior Nuclear Engineer

Last Energy is a fast-growing technology company redefining how nuclear power is designed, manufactured, and deployed. We are building a new generation of modular, distributed nuclear plants engineered for speed, scalability, and real-world impact.   We are seeking a Senior Nuclear Engineer to join our core engineering team and drive the analytical rigor behind our microreactor design. This role will act as both a technical leader and independent thinker, directly influencing design decisions that shape the future of energy. Key Duties & Responsibilities • Lead and perform complex thermal-hydraulic and neutronics calculations • Independently verify and approve engineering calculations and safety analyses prepared by peers and junior engineers • Provide expert-level review of design basis documents, licensing submittals, and technical evaluations • Mentor and guide junior engineers in analytical methods and modeling techniques • Develop and maintain detailed models for reactor systems and accident scenarios • Participate in peer reviews and regulatory interactions as a technical authority • Contribute to continuous improvement initiatives by identifying gaps and proposing innovative solutions • Adapt quickly to evolving project needs, regulatory changes, and emergent technical challenges Qualifications • Bachelor’s or Master’s degree in Nuclear Engineering or a closely related discipline • 8+ years of experience in nuclear systems analysis, safety analysis, or reactor physics • Proficiency with at least two of the following codes: TRACE, MELCOR, MCNP, VERA, SCALE, SERPENT • Demonstrated experience performing and reviewing complex engineering calculations • Strong technical writing and communication skills, with the ability to present to both technical and non-technical audiences • Department of Energy regulatory experience is preferred