Propulsion Fluids Engineer: Valves & Feedlines (Flight)

Cowboy Space Corp.; Seattle (WA); On-site; USD 130,000 - 195,000; 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

Job summary

Cowboy Space Corp. is seeking a Fluids Engineer to own a critical fluid system from concept through flight.

You will work on propulsion fluid design, vehicle propulsion feed systems, tank pressure controls, or pneumatic systems, partnering with propulsion, structures, thermal, avionics, manufacturing, and test teams. You will move quickly, iterate often, and take full ownership of fluid hardware that directly impacts mission success, with hands‑on responsibility on test campaigns and

Qualifications

• Bachelor’s degree in Mechanical, Aerospace, Chemical Engineering, or related field.
• 3+ years of experience designing fluid system hardware for flight vehicles or high‑performance hardware.
• Experience taking hardware from concept through build, integration, and test.
• Proficiency with CAD and creating engineering drawings to ASME Y14.5 GD&T standards.

Responsibilities

• Own your fluid subsystem from concept through design, analysis, test, and flight.
• Drive fluid component and system designs for minimum mass while meeting pressure drop and life-cycle requirements across ground, ascent, and on‑orbit environments.
• Design valves, fluid routing architectures, and fluid storage hardware for propellant, pneumatic, and thermal fluid service on rocket engines and vehicle fluid systems
• Balance performance, manufacturability, cost, and schedule in every design decision.
• Perform analysis — hand calculations, FEA, tolerance stack‑ups — and validate predictions with test and flight data
• Own fluid subsystem layout and integration, ensuring compatibility across propulsion, thermal, and pneumatic systems.
• Define and execute qualification and acceptance test campaigns (proof, burst, leak, flow, cycle life, vibration); author procedures, acceptance criteria, and anomaly dispositions.
• Develop and maintain engineering drawings, models, specifications, interface control documents, and release documentation.
• Work directly on the factory floor with manufacturing and technicians to iterate quickly and resolve build issues in real time.
• Troubleshoot hardware anomalies, perform root cause analysis, and implement design improvements.
• Support engine and vehicle integration, hot‑fire and fill/drain operations, ground system interfaces, post‑test inspection, and refurbishment planning.

Skills

Fluid systems design

Engineering analysis

Flight hardware experience

Education

Bachelor's degree in Mechanical, Aerospace, or Chemical Engineering

Tools

NX

SolidWorks

CATIA

Creo

ASME Y14.5 GD&T

Job description

Cowboy Space Corp. is seeking a Fluids Engineer to own a critical fluid system from concept through flight.

You will work on propulsion fluid design, vehicle propulsion feed systems, tank pressure controls, or pneumatic systems, partnering with propulsion, structures, thermal, avionics, manufacturing, and test teams. You will move quickly, iterate often, and take full ownership of fluid hardware that directly impacts mission success, with hands‑on responsibility on test campaigns and