👷 Propulsion Engineer (Spacecraft)

All Space jobs
fluid systems
fluid mechanics


Come be a part of the 21st Century Space Race. At Firefly, we are focused on the leading edge of space systems progression. Our company is committed to providing economical and convenient access to space for small payloads through the design, manufacture, and operation of reliable launch vehicles and spacecraft. To get there, we are looking for incredibly passionate, bright, and determined people to join our team.


As a Responsible Engineer for Spacecraft Propulsion, you will be responsible for the Blue Ghost lunar lander propulsion system design, concept of operations, integration, and testing. Responsible engineers guide design and analysis to produce components that meet system requirements. Parts are manufactured or procured through coordination of the Propulsion Engineer with Firefly Manufacturing Engineers. The Propulsion Engineer works closely with the systems engineering team to ensure that the propulsion system meets all vehicle requirements and that all interfaces are well defined.


  • Serve as Responsible Engineer for the propulsion system, including main and attitude control engines, valves, and propellant tanks.
  • Create analytical models to predict system performance and operating characteristics for all phases of lunar mission.
  • Select material and components compatible for operation with MMH/MON.
  • Work with Firefly Design and Analysis Engineers to mature conceptual designs into flight articles that meet lander requirements.
  • Support design reviews (PDR, CDR, etc.).
  • Work with Firefly Manufacturing and Test Engineers to fabricate test and flight propulsion systems, perform all necessary leak and alignment tests, and prepare system for integrated testing and flight.
  • Work with Firefly Systems Engineers to ensure all system requirements are met.


  • BS in Aerospace Engineering or related engineering discipline.
  • 3+ years of experience in related engineering discipline
  • Experience with storable liquid propulsion (NTO/MMH, Hydrazine)
  • Exceptional comprehension of first principles related to fluid mechanics, heat transfer, structural analysis, and materials.
  • Ability to effectively work in a multi-discipline team and provide technical guidance and insight.
  • Skill in creating analytical/numerical models of fluid systems.


  • Master’s Degree in Mechanical, Aerospace, or related engineering discipline.
  • 5+ years of experience in rocket propulsion.
  • Experience with MMH/MON.
  • Experience with flown spacecraft propulsion systems.
  • Experience with Python.


United States, Cedar park, TX

Posted 3 months ago