Principal Propulsion Engineer (Liquid Engines)

Firefly Aerospace
📍 Briggs, Texas, United States 💼 Full-time 🕒 Posted June 05, 2026

Job Description

ABOUT FIREFLY AEROSPACE


As an end-to-end space transportation company, Firefly Aerospace is on a mission to enable our world to launch, land, and operate in space – anywhere, anytime. Our launch vehicles, lunar landers, and orbital vehicles provide government and commercial customers with full mission services from low Earth orbit to the surface of the Moon and beyond. Headquartered in north Austin, Texas, Firefly is looking for passionate, hardworking innovators to join our team and help fuel our successful trajectory into space.

ABOUT THE ROLE

The Alpha Engines team is responsible for the design, integration, and operation of the Reaver and Lightning engines. As a Principal Responsible Engineer, you will work across the full lifecycle of hardware, including requirements definition, design, analysis, development, test, and qualification of the engine systems. In this role, you will lead CAD design and analysis efforts, collaborate with fabricat...

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Job Details

  • Location Briggs, Texas
  • Job Type Full-time
  • Category Engineers
  • Posted Date June 05, 2026
  • Application Deadline July 15, 2026