👷 Lead Propulsion Engineer

All Space jobs
fluid mechanics


Firefly Propulsion Engineers serve as Responsible Engineers in the development of Firefly�s rocket engines, which will power Firefly�s disruptive launch vehicles.  You will have a meaningful leadership role in all aspects of engineering development � from conceptual design through flight testing. 

Responsible engineers guide designers and analysts to produce components that meet requirements. Parts are fabricated through coordination of Propulsion Engineers and Manufacturing engineers.  Firefly Propulsion Engineers and Test Engineers work together to test fully integrated engines at Firefly�s state of the art rocket test site.


  • Serve as Responsible Engineer for an engine system or major engine subsystem, with responsibility to deliver complete propulsion systems according to launch vehicle program plans
  • Develop analytical models to predict engine performance and operating characteristics
  • Create conceptual designs of engines and components
  • Work with Firefly Design and Analysis Engineers to mature conceptual designs and create engineering definition of engine and component designs which meet vehicle requirements
  • Collaborate with Firefly Manufacturing and Test Engineers to fabricate and test propulsion systems and verify that these systems meet launch vehicle requirements



  • BS in Mechanical or Aerospace Engineering (or related engineering discipline)
  • Exceptional comprehension of engineering fundamentals: fluid mechanics, heat transfer, structural analysis, materials and processes
  • Strong understanding of rocket propulsion fundamentals: combustion devices, turbomachinery, rocket engine cycles
  • Skill in creating analytical/numerical models of engineering devices and processes
  • 3+ years of experience in a related role
  • Skill in project management
  • Demonstrated interest in advancing 'newspace'
  • Must be a U.S. person as defined by the ITAR


  • 5-10 years of experience in a related role
  • Served as a Responsible Engineer for a rocket engine (or subsystem) development project
  • Hardware test experience
  • Works well in a collaborative, multidisciplinary environment
  • Able to organize, prioritize, execute and track tasks in a high-pressure, fast paced environment
  • Self-motivated, minimum direction required.
  • Ability to creatively develop economical solutions.


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.

To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.

Firefly Aerospace, Inc. is an Equal Opportunity Employer; employment with Firefly is governed based on merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.



United States, Cedar park, TX

Posted 19d ago