Combustion Devices - Propulsion Modelling Analyst II

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 his 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 building tools to improve preliminary design, performing reduced-order thermal-fluid analyses, and suggesting design changes for engine hardware ranging from injectors and thrust chambers to igniters. You will build and 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 in-house analysis codes from scratch. To be successful in this role, you should have a strong understanding of fundamental physics and how to apply them to new, interesting problems. You should be someone who thrives in ambiguity and be capable of leading collaborative projects to completion. You will have the opportunity to have a significant influence on major engine hardware and to make rapid professional gains in an environment that encourages growth and risk.

About you:  

• Bachelor's degree in a science or engineering field
• 2+ years relevant experience in building 0D, 1D, & 2D steady state and transient fluid/thermal models
• Familiarity with numerical methods concepts such as ODEs, meshing & discretization, and optimization
• Experience with engineering scripting languages such as Python and MATLAB, as well as familiarity with code version control tools such as git
• Experience applying engineering first principles in thermodynamics, heat transfer, and fluid mechanics
• Experience communicating and explaining complex technical information to teammates and leadership

Nice to haves, but not required:  

• Graduate degree in a science or engineering field
• A strong commitment to accountability, collaboration, and execution
• An authentic, introspective, and inclusive mindset towards technical, interpersonal, and team growth & development
• Relevant experience in a rocket engine development and/or test environment
• Exposure to experimental methods such as uncertainty estimation
• Working knowledge of engine subsystems, such as combustion devices
• We believe varied perspectives & backgrounds strengthen our team, prior experience in aerospace is not required