Principal Components Engineer (Propulsion)

Firefly Aerospace

Firefly Aerospace

Cedar Park, TX, USA
Posted on Tuesday, February 20, 2024


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.


At Firefly, we believe that building a reliable and inexpensive launch vehicle requires the most reliable, production efficient propulsion and fluids components available. In tandem, our team is also designing, building, testing, and launching our first lunar lander this year. On the Components team we design valves, actuators, and other hardware tailored to the specific needs of our launch and spacecraft vehicles. Our team of engineers have cradle-to-grave ownership over the entire product lifecycle from initial conception through qualification and operations.


  • Work in cross-functional teams in analysis, manufacturing, and test engineering
  • Work with the program teams to develop hardware upgrades in alignment with ambitious performance and cost goals
  • Influence the strategic direction for new components designs and/or upgrades for new programs or missions
  • Provide technical guidance, and mentoring to the components engineering team to ensure all products are designed to meet program technical and schedule needs
  • Perform failure investigations of designs and participate in the resolution of the root cause analysis and corrective actions.
  • Create, review and approve processes for assembly and test for development/qualification testing of designs.
  • Interface with internal and external customers to define and manage component-related risks.
  • Inform and, when needed, develop technical documents, policies, and workflows including: Design standards, design databooks, analysis reports, and manufacturing workflows.
  • Develop and validate simulation-based methods against subscale and full-scale testing



  • BS in Aerospace Engineering or related engineering discipline
  • 10+ years' experience in a fluid systems or components design-related role
  • Exceptional comprehension of engineering fundamentals including fluid mechanics, heat transfer, structural analysis, materials, and processes
  • Strong understanding of fluid systems aspects such as fluids systems sizing, valve design and operation, instrumentation, flexible element design & integration and fluid fittings
  • Skilled in creating analytical/numerical models of engineering devices and processes
  • Ability to successfully manage complex projects
  • Works well in a collaborative, fast paced, multidisciplinary environment
  • Demonstrated interest in advancing 'newspace'
  • Self-motivated with minimum direction required
  • Ability to creatively develop economical solutions
  • Enjoys technical mentorship


  • Served as a Responsible Engineer for a rocket development project in a fluids related subsystem
  • Component or fluids test experience
  • Knowledge of high-pressure, cryogenic, hydraulic, pneumatic, and electrical power systems
  • Experience with valve and regulator design
  • Experience with liquid oxygen or other cryogenic operations
  • Experience modeling fluid networks
  • Experience with rapid development techniques for hardware

Firefly offers outstanding benefits for our employees, including generous health, dental and vision plans with low plan deductibles, parental leave, educational reimbursement, short term disability, pet Insurance, and flexible PTO options.

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.