Engine Systems & Test Team- Propulsion Test Responsible Engineer I

At Relativity Space, we have two audacious goals: to build the next great commercial launch company with Terran R and to become America's leading force in additive manufacturing innovation. Both contribute to our long-term vision of creating humanity’s industrial base on Mars, paving the way for interplanetary life to expand the possibilities of the human experience. This journey begins right here on Earth – where we design, build, and fly rockets to deliver customer payloads to orbit. Terran R, our medium-to-heavy lift reusable rocket, fulfills the growing demand for launch capacity, thanks to our iterative approach that accelerates design, testing, and development while minimizing costs. While our groundbreaking research and development in 3D printing pushes the boundaries of large-scale additive manufacturing.

Your journey with us is more than just a job – it’s an opportunity to shape the future of aerospace technology, additive manufacturing, and the human experience alongside a community of passionate, creative individuals. Join us on this extraordinary journey, as we work together to transform our vision into reality.

About the Team:  

The propulsion team at Relativity is responsible for the successful development of the engines that will power the Terran R vehicle. We own their design from concept through to launch and reuse. Our team partners heavily with manufacturing, test, launch, and integration teams, striving to develop our engines in record time and to support Terran R's first launch in 2026. As part of this team, you will help build, test, and iterate on the full product lifecycle of our Aeon-R engine systems, seeing them mature and eventually bring Terran R into space.

About the Role: 

This role is on the Engine Systems & Test Team. Our work spans simulation & software tools; system-level architecture, requirements, and interfaces; component & integrated system hotfire testing; and more. We collaborate closely with component engineers, our manufacturing team, our Stennis test team, and our Cape launch team to deliver engines that will successfully propel the Terran rocket to orbit. We strive for continuous improvement and support the development of our technical hardware and human teammates alike.  

We are hiring for two test sub-teams: your role will be on either the combustion devices test team (which primarily tests combustion devices like igniters, gas generators, and thrust chambers), or the integrated engine test team (which tests the full engine assembly). Within each team, your work may span several different areas depending on your skillset and the team’s needs at the time.

• In the test part of your role, you will serve as a Responsible Engineer for propulsion test articles.
  • You will develop test plans in collaboration with product owners, and you will execute test campaigns with our Stennis team, troubleshooting technical puzzles along the way.
  • You will own the exploratory operation of new and existing test article designs, diving deep into the evaluation of test hardware behavior in support of continuous engine development and certification.
  • This role is extremely varied day-to-day and, in addition to overall campaign ownership, can include writing test sequences, reviewing data, hands-on work with test articles, writing code, sitting console for hotfire tests, designing tooling, and more.
• Most test roles also involve systems work – on this side of your role, you may support engine subsystem troubleshooting, partner team product investigations, engine system analysis and simulation, trade studies, and more.
• You will also take ownership of projects of your creation to increase our collective efficiency.
• As our vehicle development program progresses, you may have the opportunity to be involved in stage test and flight campaigns – including sitting console for launch operations, defining stage test objectives, and defining flight concepts of operations (CONOPS).

In order to be successful in this role, you should be a self-starter who is capable of leading collaborative projects to completion. You should be always looking for ways to improve yourself & learn more about the systems that interface with yours – who will leverage the training & mentorship we provide to grow as an engineer and an individual. Along with these high expectations comes the opportunity to have a significant influence on a fast-growing startup company and to make rapid professional gains in an environment that encourages growth and risk.

Work schedule & travel:

• These roles are full-time onsi