ANSYS Fluent

Relativity Space

Long Beach, CA · $184,000 – $276,000

This role leads a team of fluids analysts at a rocket company, guiding the design and operation of propellant and thermal systems across the vehicle. You'll apply expertise in CFD, flow analysis, and thermal dynamics while mentoring engineers and directly shaping critical hardware decisions for an early-stage launch vehicle program.

Listed on Relativity Space’s careers site · Apply there ↗

Crusoe

Denver, CO · $190,000 – $215,000

Crusoe is seeking a Senior Staff Mechanical Systems Engineer to design and own the liquid cooling and thermal architecture of modular AI data centers, translating GPU compute requirements into production-ready hardware systems. This role bridges mechanical engineering, thermal physics, and manufacturing, requiring deep expertise in complex cooling loops and hands-on collaboration with design partners to scale high-density compute infrastructure.

Listed on Crusoe’s careers site · Apply there ↗

Voyager

Pittsburgh, PA

Thermal engineer supporting the design, testing, and operation of thermal control systems for lunar spacecraft and surface power systems at an aerospace company in Pittsburgh. Suits engineers with a background in thermal-fluid systems, spacecraft experience, and proficiency in thermal analysis software who want to contribute to lunar exploration hardware.

Listed on Voyager’s careers site · Apply there ↗

Axiom Space

Houston, TX

Axiom Space is hiring a senior engineer to lead the design and delivery of propellant feed and pressure control systems for their commercial space station, from initial requirements through flight qualification. This role suits experienced propulsion engineers who want hands-on technical ownership of complex spacecraft hardware while leading cross-functional teams in a fast-paced commercial space environment.

Listed on Axiom Space’s careers site · Apply there ↗

Eight Sleep

Full-time · San Francisco, CA · $140,000 – $200,000

Eight Sleep seeks a thermal systems expert to design and optimize the heating and cooling performance of their sleep fitness products, from concept through high-volume manufacturing. This role is ideal for an experienced mechanical engineer comfortable with significant ownership, rapid iteration, and intensive work environments.

Listed on Eight Sleep’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $160,000 – $240,000

This role leads a team of engineers analyzing fluid dynamics and thermal systems for a rocket propulsion company, translating complex physics into practical hardware designs. It suits experienced aerospace engineers with team leadership skills and CFD expertise who want hands-on involvement in vehicle development.

Listed on Relativity Space’s careers site · Apply there ↗

Axiom Space

Full-time · Houston, TX

This role develops and delivers thermal control systems for commercial space stations, managing the complete lifecycle from design through on-orbit operation. It suits experienced thermal engineers with deep knowledge of heat transfer, fluid mechanics, and spacecraft environments who want to own critical hardware for a crewed orbital facility.

Listed on Axiom Space’s careers site · Apply there ↗