Senior Fluids Engineer — Equity & Relocation Support

Cowboy Space Corporation; Seattle (WA); On-site; USD 160,000 - 185,000; Full time

Benefits offered by this job

Equity in Cowboy Space Corp.

Medical, dental, and vision insurance

401(k) retirement savings plan

Paid time off

10 paid holidays per calendar year

Paid parental leave

Relocation assistance if applicable

Daily lunch in the office and snacks

Job summary

Cowboy Space Corp. is seeking an experienced Fluid Systems Engineer to own the propulsion, fluids, and thermal management hardware.

You will design, analyze, and qualify valves, tanks, and routing for launch vehicle systems, guiding hardware from concept through flight readiness. Responsibilities cover integration with propulsion and thermal systems, performance verification through hydraulic/pneumatic analysis, material selection, and documentation.

Qualifications

• Bachelor’s degree in Mechanical, Aerospace, Chemical, or related engineering field.
• 3+ years designing fluid system hardware for flight or high-performance applications.
• Experience with fluid system analysis: pressure drop, flow sizing, structural analysis of pressure vessels, or thermal-fluid modeling.

Responsibilities

• Design valves (flow control, isolation, regulation, check, and relief) for propellant, pressurant, and thermal fluid systems used on propulsion and launch vehicle systems.
• Develop fluid storage hardware including propellant tanks, pressure vessels, and accumulators from concept through qualification.
• Design fluid routing architecture: tubing runs, manifolds, fittings, flex lines, and quick-disconnects for vehicle integration.
• Own fluid subsystem layout and integration, ensuring compatibility across propulsion, thermal, and pneumatic systems.
• Perform hydraulic and pneumatic analysis (pressure drop, flow distribution, water hammer, thermal transients) to size components and verify system performance.
• Perform structural analysis (FEA, hand calcs) and validate with test and flight data.
• Select materials compatible with propellants, pressures, and operating environments (cryogenic, high-pressure, corrosive).
• Generate detailed component and assembly drawings, specifications, and interface control documents.
• Support and execute component-level and system-level test campaigns (proof, burst, flow, leak, cycle life).
• Work directly with manufacturing and technicians to resolve build issues, improve producibility, and support rapid iteration.
• Support vehicle integration, fill/drain operations, and ground system interfaces.
• Contribute to anomaly investigation, post-flight inspection, and design improvements for reuse and reliability.

Skills

Fluid system design

CAD for hardware design

Hands-on hardware testing

Engineering analysis

Team collaboration

Education

Bachelor's degree in Mechanical/Aerospace Engineering

Tools

NX

CATIA

SolidWorks

Job description

Cowboy Space Corp. is seeking an experienced Fluid Systems Engineer to own the propulsion, fluids, and thermal management hardware.

You will design, analyze, and qualify valves, tanks, and routing for launch vehicle systems, guiding hardware from concept through flight readiness. Responsibilities cover integration with propulsion and thermal systems, performance verification through hydraulic/pneumatic analysis, material selection, and documentation.