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Relativity Space

Propulsion Thermal Analyst II

Relativity Space, Long Beach, California, us, 90899

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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. Our groundbreaking research and development in 3D printing push 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:

In this role, you’ll

directly contribute to

the design and qualification of the Aeon-R combustion devices hardware, from

concept to detailed design and test . Your responsibilities will include performing, documenting, presenting thermal-structural and/or thermal-fluid analyses, and suggesting design changes for engine hardware ranging from injectors and thrust chambers to igniters. You’ll anchor your models to test data and work closely with designers to inform design paths and validate requirement compliance. This scope will involve single-component modeling as well as the development of large-scale assembly models for quantifying subsystem interactions. To be successful, you should have a strong understanding of fundamental physics and how to apply them to new, interesting problems. You should thrive in ambiguity and be capable of leading collaborative projects to completion. This role offers the opportunity to influence major engine hardware and make rapid professional gains in a growth-oriented environment. About you:

Bachelor's degree in a science or engineering field 2+ years relevant experience conducting structural analysis Experience with analytical tools such as ANSYS Mechanical, Thermal Desktop, ANSYS Fluent, STAR-CCM+, or similar Experience applying engineering first principles in thermodynamics, heat transfer, and fluid flow Experience communicating complex technical information effectively Nice to haves, but not required:

Graduate degree in a science or engineering field Strong commitment to accountability, collaboration, and execution Inclusive mindset towards technical and team growth Relevant experience in rocket engine development/testing Knowledge of engine subsystems, such as combustion devices Understanding of structural failure mechanisms, fatigue, and fracture mechanics Experience working with manufacturing to produce high-quality hardware Experience with powder bed additive manufacturing and automation techniques Prior aerospace experience is not required, as we value diverse perspectives. At Relativity Space, we are committed to transparency and fairness in our compensation practices. Actual compensation will be based on experience and qualifications. Our total rewards include competitive salary and equity, generous PTO and sick leave, parental leave, an annual learning stipend, and more. For details, visit

here . Hiring Range: $112,000 — $143,000 USD We are an equal opportunity employer and value diversity. We do not discriminate on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability.

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