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Spacecraft Thermal Engineer III

Firefly Aerospace

Cedar Park, Texas, United States Full-time July 04, 2026
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Vacancy Description

ABOUT FIREFLY AEROSPACE
As an end-to-end responsive space company, Firefly Aerospace is on a mission to enable our world to launch, land, and operate in space – anywhere, anytime. Our small- to medium-lift launch vehicles, lunar landers, and orbital vehicles allow us to service the entire lifecycle of government and commercial missions from low Earth orbit to the Moon and beyond. We utilize carbon composite structures, patented propulsion technologies, and common components across our vehicles to iterate quickly, improve reliability, and deliver payloads at a lower cost.

SUMMARY

Firefly Senior Thermal Engineers provide technical leadership for spacecraft thermal analysis across multiple vehicle programs. They develop analytical approaches for complex thermal challenges, establish modeling strategies, mentor engineers across the organization, and influence major program decisions throughout vehicle development.

This role requires deep expertise ...

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