Senior Propulsion Test Engineer
Listed on 2026-08-19
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Engineering
Test Engineer, Aerospace / Aviation / Avionics, Mechanical Engineer, Systems Engineer
Senior Propulsion Test Engineer
Joining Relativity means becoming part of something where autonomy, ownership, and impact exist at every level. Here, you're not just executing tasks; you're solving problems that haven't been solved before, helping develop a rocket, a factory, and a business from the ground up. Whether you're in propulsion, manufacturing, software, avionics, or a corporate function, you'll collaborate across teams, shape decisions, and see your work come to life in record time.
Relativity is a place where creativity and technical rigor go hand in hand, and your voice will help define the stories we're writing together. Now is a unique moment in time where it's early enough to leave your mark on the product, the process, and the culture, but far enough along that Terran R is tangible and picking up momentum.
The most meaningful work of your career is waiting. Join us.
The Stennis Test team designs, builds, and operates test sites to evaluate Terran R's high-energy components, rocket engines, and both booster and upper stages. Team members are hands-on with these large-scale, complex systems, pushing hardware to the limits and directly contributing to flight readiness. The work is fast-paced, highly operational, and collaborative. No aerospace experience required—we welcome fresh graduates as well as those with hands-on backgrounds in aviation, automotive, manufacturing, offshore operations, industrial systems, construction, or adjacent industries.
As the Stennis Test site scales to meet growing demand, the team plays a critical role in paving the way for routine, reliable flights of Terran R.
As a Senior Propulsion Test Engineer, you will work with test stands and test articles (high-energy components, engines, and full stages) for Terran R. You'll have the opportunity to see a heavy-lift orbital launch vehicle and its many parts come to life through testing. Test and flight articles are designed and built in our Long Beach factory, then sent to Stennis to undergo rigorous testing.
You'll solve a variety of technical problems across broad ranges of timeframe, complexity, and impact, and continuously improve processes to move faster and more efficiently. The role includes three focus areas - Design & Build, Operations, and Integration. You'll initially be placed on a team in one focus area, with opportunities to work across focuses as you develop in the role, particularly between Operations and Integration which work closely together.
& Build Focus
Operations Engineers typically work a scheduled morning or evening shift
About You- Bachelor's degree in mechanical engineering, aerospace engineering, or a related field
- No aerospace experience needed—we value unique backgrounds and perspectives
- Demonstrated ability to safely operate common power tools
- Ability to deliver on tight schedules, especially when unconventional & creative solutions are necessary
- This role may require travel to production and launch locations, up to 10%
- Valid driver's license to operate vehicles on the test site
Nice to haves but not required
- Proficiency in 3D modeling and drafting, including GD&T
- Strong engineering fundamentals in Thermal Fluid Systems and Structures
- Hands-on fabrication experience for complex assemblies
- Working knowledge of fluid components and ability to…
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