Fluids Engineer

Cowboy Space•San Carlos, CA

1d•Onsite

About The Position

Fluids Engineer About Cowboy Space Corp. Cowboy Space Corp. is building the infrastructure to power and connect the orbital economy. Our satellites operate in Low Earth Orbit to collect sunlight and enable a new class of capabilities—from transmitting energy via infrared lasers (space-to-earth and space-to-space), to powering on-orbit compute, to delivering secure, high-bandwidth optical data. By rethinking how energy and data are generated and distributed in space, we’re unlocking entirely new ways to operate both in orbit and on Earth. Founded in 2024 by Baiju Bhatt (co-founder of Robinhood), Cowboy Space Corp. is backed by leading investors and built by a team from top aerospace and defense organizations. We’re moving quickly to solve complex technical challenges and build a new category of space infrastructure. About the role: As a Fluids Engineer focused on propulsion, you will play a critical role in designing and analyzing fluid systems that enable spacecraft maneuverability, station-keeping, and mission longevity. You will work on propellant storage, transfer, and control systems, helping define how our vehicles operate efficiently and reliably in space over extended missions. You will collaborate closely with a cross-functional team of propulsion, avionics, and spacecraft systems engineers to develop next-generation fluid and propulsion architectures that support Cowboy Space Corp's unique mission profile.

Requirements

BS in Mechanical Engineering, Aerospace Engineering, or related field
2+ years of experience in fluid systems, propulsion, or thermo-fluid analysis
Strong fundamentals in fluid mechanics, thermodynamics, and heat transfer
Experience with fluid modeling or CFD tools (e.g., ANSYS Fluent, Flow3D, CFD++, MATLAB/Simulink, or similar)
Ability to work across disciplines in a fast-paced, iterative engineering environment

Nice To Haves

Experience with spacecraft propulsion systems (chemical or electric)
Background in propellant management, including storage, transfer, and pressurization systems
Experience with cryogenic or high-pressure fluid systems
Familiarity with spacecraft operations or mission design considerations (e.g., station-keeping, orbit raising)
Proficiency in programming or scripting (Python, MATLAB, or similar)
Experience supporting hardware development, testing, and validation

Responsibilities

Design and analyze propulsion-related fluid systems, including propellant storage, distribution, and pressurization architectures
Develop and run fluid and thermo-fluid models to evaluate system performance across mission phases
Support propulsion system sizing, trade studies, and configuration optimization for spacecraft maneuvering and station-keeping
Analyze transient and steady-state fluid behavior including phase change, thermal coupling, and pressure dynamics
Define system requirements and support verification and validation activities
Partner with mechanical design, systems engineering, and GNC teams to integrate propulsion systems into the broader spacecraft architecture
Evaluate supplier components (valves, tanks, regulators, thrusters) and support selection and testing
Contribute to test planning, data analysis, and iteration of propulsion and fluid subsystems