Deep Fission is a nuclear technology company pioneering the development of a revolutionary deep borehole pressurized water reactor. We recently completed a private placement financing and Alternative Public Offering and are now operating as a public company while maintaining our startup agility and innovation focus. S.

Nuclear Regulatory Commission (NRC), we are executing our next phase of growth as we advance our groundbreaking nuclear technology toward commercial deployment. Job Summary Deep Fission is seeking a Mechanical Systems Design Engineer to support the engineering and design of surface mechanical systems for the reactor pilot project. This person will contribute to the design for standard nuclear mechanical systems such as the chemical volume control system, secondary coolant system, and balance of plant systems.

The ideal candidate will bring expertise in mechanical-fluidic system design, nuclear systems, construction, interdisciplinary interface and technical subcontract management.

Requirements

evolve, and creative problem-solving is essential. The Mechanical Systems Design Engineer will support alignment between multiple engineering disciplines, construction, procurement, and licensing.

, identifying issues as they arise during project execution. Required Skills Experience: 5+ years of experience in the relevant engineering discipline, including successful delivery of mechanical system designs. Background in regulated environments such as nuclear, aerospace, defense, utility or industrial capital projects.

Bachelor’s degree in Engineering or related technical field with a deep understanding of engineering fundamentals and modern design practices. , NQA-1), and compliance documentation. Ability to perform in a design role supporting large design efforts with multiple interfaces and stakeholders.

Ability to maintain communication and stakeholder engagement in a virtual and hybrid team environment. S.

under 10 CFR 810. Desired Skills Experience: Licensed Professional Engineer (PE) or pursuing professional registration is a plus Experience with SMRs, Gen IV technologies, or first-of-a-kind nuclear reactor development. Demonstrated experience navigating NRC or DOE regulations.

, NQA-1), and compliance documentation.

Key Responsibilities

: Perform mechanical system engineering tasks for the development of Deep Fission’s surface facilities - from conceptual development through licensing, fabrication, construction, startup, and turnover. Coordinates or prepares diagrams, specifications, procurement documents, and award recommendations. Ensure effective coordination with the other engineering disciplines to maintain alignment on technical scope.

Advance designs rapidly in a dynamic environment, applying sound engineering judgment and calculated risk management. Support interface activities between partner organizations and major subcontractors, participating in face-to-face events to create effective work and decision-making environments. Contribute to general design coordination events such as mechanical system design reviews and in-person design workshops.

Promote a proactive nuclear safety culture across office and field-based activities. Advocate for the Deep Fission company and its technology. Participate in project planning (schedule and budgeting) and be prepared to commit to delivery against the project plan.