Engine Systems & Test Team- Propulsion Test Engineer II

Long Beach, California

At Relativity Space, we’re building rockets to serve today’s needs and tomorrow’s breakthroughs. Our Terran R vehicle will deliver customer payloads to orbit, meeting the growing demand for launch capacity. Achieving commercial success with Terran R will unlock opportunities to advance science, exploration, and innovation, pioneering progress that reaches beyond the known.

Joining Relativity means becoming part of a culture where autonomy, ownership, and impact exist at every level. Here, you’ll solve 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.

This role is on the Engine Systems & Test Team. Our work spans simulation & software tools; system-level architecture, requirements, and interfaces; component & integrated system hot‑fire testing; and more. We collaborate closely with component engineers, our manufacturing team, our Stennis test team, and our Capella 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 the integrated engine test team (which tests the full engine assembly). 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 hot‑fire 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.

• This role is full‑time onsite in Long Beach, CA with an average of 25% travel to our test & launch sites.
• This role may occasionally require weekend work for critical milestones.
• This role requires working shifted schedules (1st and 2nd shift) on a rotating basis.

• We believe varied perspectives & backgrounds strengthen our team. Prior experience in aerospace is not required.
• 2+ years of experience in a complex engineering system development and/or test environment and Bachelor’s degree in a science, engineering, technology, or mathematics field.
• Experience with:
  • Applying engineering fundamentals in fluid mechanics & thermodynamics
  • Problem‑solving
  • Working in a collaborative environment
• Demonstrated ability to execute high‑ownership…