Spacecraft Liquid-Cooling Systems Engineer for GPU Compute

Cowboy Space Corp.; United States; On-site; USD 100,000 - 300,000; Full time

Benefits offered by this job

Equity

Health insurance

Dental insurance

Vision

401(k)

Paid time off

Paid holidays

Parental leave

Relocation assistance

Daily lunch in office

Job summary

Cowboy Space Corp. is seeking a Mechanical Engineer – Active Cooling to own the liquid cooling loop for on‑orbit GPU compute hardware.

You will design, size, and integrate pumps, cold plates, heat exchangers, tubing, and instrumentation, and own packaging and interfaces from concept through ground tests and flight qualification. Collaborate with thermal, power, structures, avionics, propulsion and software teams to deliver a robust, flight‑worthy cooling solution.

Qualifications

• BS or MS in Mechanical Engineering, Aerospace Engineering, or a related field.
• 3+ years of experience designing or analyzing fluid systems and/or mechanical hardware in high-performance environments.
• Strong fluids fundamentals: flow, thermodynamics, heat transfer, and pressure systems.
• Hands-on experience with pumps, valves, tubing, instrumentation.
• Experience taking hardware from concept through build and test.
• Proficiency with CAD and fast-paced hardware development.

Responsibilities

• Own the design of the spacecraft liquid cooling loop for GPU compute hardware from concept through flight, including cold plates, pumps, valves, accumulators, heat exchangers, tubing, fittings, and instrumentation.
• Perform pressure-drop, flow, and thermal-fluid analyses to size the loop and predict system behavior across the full mission profile, balancing heat rejection, pump power, mass, and reliability.
• Design the mechanical packaging, structures, mounts, and mechanisms that house and integrate the cooling loop, and couple it to radiators and the broader thermal control system.
• Design, build, and operate ground testbeds and dev rigs to characterize components, validate the loop, and de-risk the flight design ahead of qualification.
• Develop and execute proof‑pressure, leak, flow, thermal‑vacuum, and qualification/acceptance test programs to verify flight‑worthiness.
• Author and maintain schematics, drawings, interface control documents, analysis reports, test procedures, and release/configuration records.
• Select, size, and integrate coolant loop components to meet performance, mass, and reliability requirements, and work with suppliers to ensure high‑quality, scalable production.
• Diagnose and resolve cooling‑system anomalies during integration and test, applying root‑cause analysis and implementing corrective actions.
• Partner with thermal, power, structures, avionics, propulsion, and software teams to ensure the cooling loop integrates seamlessly within the overall spacecraft architecture.
• Embrace a fast‑paced development environment, driving quick design cycles, hardware builds, and test campaigns to accelerate the program schedule.

Skills

Fluid systems design

Mechanical design

CAD (NX/SolidWorks)

Hands-on hardware integration

Systems engineering collaboration

Education

Bachelor's or Master's in Mechanical/Aerospace Engineering

Tools

NX

SolidWorks

Thermal analysis tools

Job description

Cowboy Space Corp. is seeking a Mechanical Engineer – Active Cooling to own the liquid cooling loop for on‑orbit GPU compute hardware.

You will design, size, and integrate pumps, cold plates, heat exchangers, tubing, and instrumentation, and own packaging and interfaces from concept through ground tests and flight qualification. Collaborate with thermal, power, structures, avionics, propulsion and software teams to deliver a robust, flight‑worthy cooling solution.