Propulsion Engineer ; Spacecraft Fluids

ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company that enables our world to launch, land, and operate in space – anywhere, anytime. As the partner of choice for critical space missions, Firefly is the only commercial company to launch a satellite to orbit with 24-hour notice and the only company to achieve a successful Moon landing. Our launch vehicles, lunar landers, and orbital vehicles provide government and commercial customers with full mission services from low Earth orbit to 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 FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to reliably and repeatedly launch, land, and operate space systems from Earth to the Moon and beyond. As the partner of choice for critical space missions, Firefly is the first commercial company to launch a satellite to orbit with 24-hour notice and the first company to achieve a successful Moon landing.

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 Propulsion Fluid Systems team is responsible for the design, integration, and operation of all fluid subsystems across Firefly’s spacecraft. As a Responsible Engineer, you will work across the full lifecycle of hardware, including requirements definition, design, analysis, development, test, and qualification of the Blue Ghost and Elytra spacecraft fluid systems. You will lead CAD design and analysis efforts, collaborate with fabrication and integration teams to build and assemble the system, and support vehicle testing and launch operations.

Fluid Systems Engineers have deep technical knowledge, ownership of hardware from concept to flight, and clear communication with cross-functional partners including structures, propulsion, avionics, and vehicle systems. The successful candidate will be a self-starter who enjoys challenging assumptions, thrives in a fast-paced development environment, and seeks to make impactful contributions to Firefly’s mission.

RESPONSIBILITIES Demonstrate full ownership of spacecraft fluid system requirements, design, and analysis from concept through flight.

Lead development of innovative design concepts for propulsion integration and operations that reduce complexity and maximize reliability within program constraints.

Serve as the primary technical point of contact for all spacecraft fluid systems.

Author and present detailed design review presentations to internal and external stakeholders

Plan, coordinate, and execute development, qualification, and acceptance testing of flight hardware, including data analysis and reviews.

Implement design-for-manufacturability improvements to increase production efficiency and vehicle reliability.

Identify system-level risks, perform trade studies, and drive decisions to ensure successful vehicle operation.

Develop and maintain automation tools and test data analysis capabilities.

Support vehicle test and flight campaigns by providing console operations support.

Collaborate with manufacturing and integration teams to develop processes, work instructions, and test procedures, and provide direct build support

Drive development of efficient test and flight operations for fluid systems and assist with troubleshooting during vehicle operationsQUALIFICATIONSRequiredB.S. in Mechanical, Aerospace, or related engineering discipline1+ years of experience in fluid systems engineering and/or propulsion

Thorough understanding of fluid dynamics and thermodynamics

Experience…