Nuclear Systems Design Engineer

The Role

You will develop reactor and nuclear-island systems and analyses, working across disciplines rather than inside a single one. We are looking for someone with a solid foundation in one nuclear-engineering area and the appetite to work across reactor physics, thermal-hydraulics, safety, fuel, mechanical systems, controls, and licensing interfaces.

• Contribute to development and evaluation of reactor-system configurations: core, reactor pressure vessel, primary systems, containment, decay-heat removal, emergency cooling, I&C, and supporting nuclear-island systems.

• Help translate mission requirements, subsea deployment constraints, and regulatory strategy into engineering requirements and design criteria, and document the basis for decisions.

• Perform first-principles calculations, reduced-order models, and trade studies; build plant models using system-analysis and reactor-physics tools.

• Support definition of operating states, initiating events, accident scenarios, safety functions, and acceptance criteria.

• Prepare technical inputs for consultants, laboratories, and suppliers, and support review of their deliverables.

• Support design-maturity gates, NRC pre-application activities, licensing-basis development, and safety-case documentation.

• Develop and document nuclear-system interfaces with subsea structures, installation and retrieval, electrical export, and remote operations.

Qualifications

• PhD in nuclear engineering or a closely related discipline.

• 4+ years in nuclear design, analysis, operations, research, or systems engineering. Directly relevant graduate research may count toward part of this.

• A solid foundation in at least one of: reactor thermal-hydraulics, reactor physics or core design, nuclear safety analysis, fuel performance, plant dynamics and controls, or nuclear systems engineering — and genuine interest in working across the others.

• Experience building and documenting engineering calculations or models, including assumptions, methods, and limitations.

• Ability to distinguish preliminary engineering judgment from validated analysis and licensing-quality evidence.

• Strong technical writing and review skills.

Nice to Have

• Advanced degree in nuclear engineering or a related field.

• Boiling-water reactors, natural-circulation systems, SMRs, advanced reactors, or marine nuclear systems.

• TRACE, RELAP5, PARCS, MELCOR, SCALE, MCNP, Serpent, OpenMC, FRAPCON, SNAP, or equivalent; Python or MATLAB.

• Familiarity with 10 CFR Part 50, 52, or 53 licensing, risk-informed design, PRA, or nuclear QA.

• Experience developing system requirements, interface-control documents, or V&V plans.

• Experience coordinating consultants, laboratories, universities, or major equipment suppliers.

Compensation & Benefits

Base salary, meaningful equity, and full benefits, including 401(k), medical/dental/vision, paid time off, company holidays, and parental leave, subject to company plans and policies. Compensation reflects role scope, relevant experience, technical depth, and expected impact.

Compensation Range: $120,000 base salary, plus stock options, commensurate with experience.

Equal Employment Opportunity

Momentum Power is an equal opportunity employer. Qualified applicants will receive consideration without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability, genetic information, protected veteran status, or any other characteristic protected by applicable law.

Pay: $120,000.00 per year

Benefits:

• 401(k)
• Dental insurance
• Health insurance
• Paid time off
• Parental leave
• Relocation assistance
• Vision insurance

Work Location: In person