Lead Fluid Systems Engineer — Spacecraft GPU Cooling

Cowboy Space Corporation; Seattle (WA); On-site; USD 100,000 - 300,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401(k) retirement savings plan

Paid time off

Paid holidays

Parental leave

Relocation assistance

Lunch in office and stocked kitchen

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, valves, accumulators, cold plates, and instrumentation while coordinating with thermal, power, structures, avionics, propulsion, and software teams. This hands-on role demands strong fluids knowledge, flight hardware experience, and the ability to iterate quickly from concept through ground tests to on-orbit operation

Qualifications

• BS or MS in Mechanical, Aerospace, or related field
• 3+ years in designing or analyzing fluid systems and/or mechanical hardware
• Strong fluids fundamentals: flow, thermodynamics, heat transfer, pressure systems
• Hands-on with pumps, valves, tubing, and instrumentation
• Experience moving hardware from concept to build and test
• Strong mechanical design fundamentals
• Proficient in CAD (NX, SolidWorks or similar)
• Experience in fast-paced hardware-focused environments

Responsibilities

• Own the design of the spacecraft liquid cooling loop from concept through flight
• Perform pressure-drop, flow, and thermal analyses to size the loop
• Design mechanical packaging, mounts, and interfaces for the cooling loop
• Build and operate ground testbeds and dev rigs
• Execute proof-pressure, leak, flow, and qualification tests
• Maintain schematics, drawings, interface control documents, and test procedures
• Select and integrate coolant loop components and coordinate with suppliers
• Diagnose cooling-system anomalies and apply root-cause actions
• Collaborate with thermal, power, structures, avionics, propulsion, software teams
• Drive fast design cycles and hardware builds to accelerate program

Skills

Fluid systems design

Mechanical design

Test and verification

Hands-on hardware integration

CAD (NX, SolidWorks)

Spaceflight hardware knowledge

Fast-paced development

Education

BS/MS in Mechanical Engineering or Aerospace Engineering

Tools

NX

SolidWorks

Thermal-Fluid Analysis

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, valves, accumulators, cold plates, and instrumentation while coordinating with thermal, power, structures, avionics, propulsion, and software teams. This hands-on role demands strong fluids knowledge, flight hardware experience, and the ability to iterate quickly from concept through ground tests to on-orbit operation