We are building a next-generation nuclear energy company focused on a single, standardized microreactor core deployed in two variants: terrestrial power and lunar/space power.
Our mission is to deliver portable, long-life, factory-fabricated nuclear systems that are safe, licensable, and scalable. We are seeking a Senior Nuclear Engineer to take technical ownership of reactor physics, neutronics, and core safety analysis for our unified reactor platform.
This role is central to the credibility, licensability, and long-term success of the company. You will work closely with systems, thermal, mechanical, and licensing teams to mature a reactor design intended for real deployment—not paper studies.
Tasks
Own reactor physics and neutronics analysis for the core across terrestrial and space variants
- Perform steady-state and transient analyses, including reactivity coefficients, kinetics parameters, shutdown margins, and power distributions
- Develop, validate, and document modeling methods using Monte Carlo and deterministic tools
- Support safety analysis, fault response modeling, and design basis events
- Assess conservatism, uncertainties, and assumptions in nuclear calculations
- Interface with systems, thermal-hydraulics, materials, and mechanical engineering teams
- Contribute to licensing strategy, regulatory documentation, and external technical reviews
- Mentor junior engineers as the team grows
Requirements
- Degree in Nuclear Engineering or closely related field (MS or PhD preferred)
- 6+ years of experience in nuclear reactor analysis, design, or safety
- Strong experience with neutronics tools such as MCNP, Serpent, OpenMC, SCALE, or equivalent
- Experience documenting analysis methods for internal, regulatory, or external stakeholders
- Ability to work across disciplines in a fast-moving technical environment
Benefits
- Meaningful equity participation in a foundational nuclear platform
- Competitive medical, dental, and vision coverage
- Flexible PTO and paid holidays
- Direct access to leadership and real technical authority
- Opportunity to shape a reactor that will operate on Earth and beyond
If you are motivated by building a reactor that will actually be deployed rather than endlessly redesigned, then we want to speak with you. This is a rare opportunity to help define a unified nuclear platform from first principles through operation.