Vehicle Fluids Systems Engineer — Rockets

Segment (Twilio); Long Beach (CA); On-site; USD 164,000 - 225,500; Full time

Benefits offered by this job

Equity

PTO

Sick leave

Parental leave

Learning stipend

Job summary

Relativity Space seeks a Vehicle Fluids Product Responsible Engineer to own the fluid system architecture for a vehicle product line. You will apply deep expertise in system architecture, fluid thermodynamics, and modeling to guide hardware design, analysis, and operations.

You will lead cross‑functional interfaces with Propulsion, Structures, GNC, and Avionics, perform 1D thermofluids sizing, and define test scopes to reduce risk before full vehicle testing.

Qualifications

• Bachelor’s degree in Mechanical Engineering or relevant.
• 7+ years of experience with complex fluids systems.
• Strong background in fluid system architecture, operations and application of engineering fundamentals in system design, thermodynamics, fluid dynamics, and heat transfer.
• Proficient with fluid/thermal modeling tools for internal compressible and incompressible fluid analysis.
• Experience with programming languages such as MATLAB, Python, or C++ for data analysis or modeling.
• Direct experience designing or operating launch vehicle or spacecraft fluid or propulsion systems.
• Nice to have: experience with certification of a vehicle fluid system for NSSL and/or range certification.

Responsibilities

• Own the integrated stage‑level fluid architecture and schematics, ensuring seamless functionality across all propellant, pressurant, and pneumatic subsystems.
• Lead cross‑functional interface definitions and negotiations with partner vehicle teams to ensure flawless system integration.
• Assist with sizing and fluid 1D steady‑state thermofluids analysis at both the system and component levels when necessary.
• Define development, qualification, and acceptance testing scopes to buy down technical risk prior to vehicle‑level integrated testing.
• Participate in CONOPS development and operation data review to take ultimate ownership of the successful operational philosophy and testing execution of the fluid systems at the integrated vehicle level.

Skills

Fluid systems

Thermodynamics

Fluid modeling

Launch vehicles

Education

Bachelor’s degree in Mechanical Engineering or relevant

Tools

MATLAB

Python

C++

Job description

Relativity Space seeks a Vehicle Fluids Product Responsible Engineer to own the fluid system architecture for a vehicle product line. You will apply deep expertise in system architecture, fluid thermodynamics, and modeling to guide hardware design, analysis, and operations.

You will lead cross‑functional interfaces with Propulsion, Structures, GNC, and Avionics, perform 1D thermofluids sizing, and define test scopes to reduce risk before full vehicle testing.