# Propulsion Engineer II/III - Alpha Engines at Firefly Aerospace

- Company: Firefly Aerospace
- What the company does: Firefly Aerospace engages in providing economical and convenient access to space for small payloads through the design, manufacture, and operation of reliable launch vehicles. Backed by Space Capital.
- Company website: https://fireflyspace.com
- Type: Startups
- Level: Mid level
- Location: Briggs, TX
- Work setup: On-site
- Posted: 2026-10-23
- Apply by: 2026-12-07
- Apply: https://fireflyspace.wd115.myworkdayjobs.com/en-US/Firefly/job/Briggs-TX/Propulsion-Engineer-II-III---Alpha-Engines_JR100265?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/firefly-aerospace-propulsion-engineer-ii-iii-alpha-engines/

## About the role

As a Responsible Engineer, you will own engine hardware across its full lifecycle – requirements definition, design, analysis, development, test, qualification, and flight. You will lead the design and analysis of the hardware, collaborate with fabrication and integration teams to manufacture and assemble the system, and support vehicle testing and launch operations. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- Demonstrate full ownership of launch vehicle engine hardware through the full product life cycle
- Lead the design and analysis of engine components and assemblies to meet performance, reliability, manufacturability, and operability requirements
- Drive component and system analyses including fluid, structural, thermal, and dynamic
- Collaborate with manufacturing and integration teams to develop processes, work instructions, and test procedures
- Plan, coordinate, and execute development, qualification, and acceptance testing of flight hardware, including data analysis and reviews
- Develop tools for design, analysis, and test data review


Source: 1752vc Careers, https://www.1752.vc/careers/jobs/firefly-aerospace-propulsion-engineer-ii-iii-alpha-engines/