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Senior Thermal Engineer

Senior Thermal Engineers design and optimize thermal systems for complex products, managing heat transfer, temperature control, and thermal performance from concept through manufacturing and operation. They conduct thermal analyses, design cooling and heating systems, oversee testing and validation, and often lead teams of junior engineers while collaborating across mechanical, electrical, and systems engineering disciplines. The role suits experienced mechanical engineers with strong analytical skills, expertise in thermal simulation software and testing methods, and the ability to balance performance requirements with manufacturing constraints and cost considerations.

Open Senior Thermal Engineer roles (5)

Apply for Senior Thermal Engineer at CesiumAstro on their site

Senior Thermal Engineer

CesiumAstro

Westminster, CO · $133,000 – $161,000

Listed on CesiumAstro’s careers site · Apply there ↗

Apply for Senior Thermal Engineer at Voyager on their site

Senior Thermal Engineer

Voyager

Pittsburgh, PA

Listed on Voyager’s careers site · Apply there ↗

Senior Thermal Engineer

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 ↗

Apply for Senior Thermal Engineer at AST SpaceMobile on their site

Senior Thermal Engineer

AST SpaceMobile

Dallas, TX

Listed on AST SpaceMobile’s careers site · Apply there ↗

Senior Thermal Engineer

Relativity Space

Long Beach, CA · $132,000 – $198,000

This role leads the thermal engineering team responsible for ensuring Terran R launch vehicle components survive extreme temperature conditions across all flight phases and ground operations. You'll architect thermal systems, conduct multi-level analyses, direct engineers, and oversee testing while working closely with hardware and cross-functional teams to solve complex vehicle integration challenges.

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

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