Cycle Performance Engineer - Turbomachinery

About Valar Atomics

At Valar Atomics, we're redefining what's possible in energy. Our mission is to make clean, high-temperature nuclear power scalable-unlocking abundant energy for industry, hydrogen, and next‑generation manufacturing. We are a team of builders, engineers, and operators who believe nuclear energy should be fast to deploy, factory‑made, and built for the real world. Our first pilot plant in Orangeville, Utah will demonstrate how advanced nuclear systems and fuel fabrication can power the future.

Joining Valar Atomics means becoming part of a company where autonomy, ownership, and impact exist at every level.

As part of the Engineering organization, Power Conversation develops the technologies that efficiently transform reactor‑generated heat into usable electrical power. The team focuses on maximizing system performance, reliability, and commercial viability.

Valar Atomics is seeking a turbo machinery aerodynamics engineer to join the turbo machinery team and advance power generation capability. In this role, you'll be responsible for the cycle performance modeling for cutting edge turbo machinery. You'll be working with cross‑functional team members to define a high efficiency, highly producible cycle design. As an early hire in turbo machinery, you will be able to directly influence design decisions on the system architecture.

• Develop and maintain a thermodynamic model of the power conversion system
• Aggregate, interpret and integrate the contributions of component owners into the overall cycle model
• Partner with turbo machinery, secondary flow, and heat exchanger owners to input their component performance into the system model
• Define instrumentation plans to calibrate the cycle model to tested results
• Evaluate system level trades to drive the cycle to the optimal business outcome

• You are excited to be a part of a complex turbo machinery product from the beginning
• You thrive in ambiguous environments without defined turbo machinery design best practices
• You want to be part of turbo machinery design beyond a singular aerodynamic, structural or manufacturing perspective

• Bachelor's degree in Mechanical or Aerospace Engineering
• 3 years experience in analyzing thermodynamic cycles in a thermodynamic solver (NPSS, Aspen, Gate Cycle, Flownex, EES, etc.)

• Master's degree in Mechanical or Aerospace Engineering
• Experience with modeling closed cycles
• Test experience with turbo machinery
• Experience with supercritical C02
• Experience analyzing turbo machinery at a component design level

• Competitive base salary
• Equity ownership in a rapidly growing advanced energy company
• Comprehensive medical benefits
• Unlimited PTO
• Free daily lunch and dinner provided onsite
• Generous PPE stipend
• High‑impact startup environment with significant ownership and autonomy
• Opportunities for rapid career growth and internal advancement
• Direct collaboration with experienced operators, engineers, and industry leaders
• The opportunity to help build and scale transformative energy technology from the ground up

Valar Atomics is an equal opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, gender identity, sexual orientation, national origin, age, disability, veteran status, or any other protected status under applicable law. We are committed to providing a workplace free of discrimination and harassment and will provide reasonable accommodation as required by law. Applicants must be legally authorized to work in the United States as a U.S. citizen or lawful permanent resident (green card holder).

Salary $140,000 - $215,000 USD