Senior Propulsion Fluids Engineer

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

Benefits offered by this job

Equity

Medical Insurance

401(k)

Paid Time Off

Holidays

Parental Leave

Relocation Assistance

Office Lunch

Job summary

Cowboy Space Corp. is seeking a Mechanical Engineer to own the design and development of fluid system hardware for propulsion, fluids, and thermal management on our launch vehicle.

You will design valves, tanks, tubing, and manifolds, and work across the full lifecycle from concept through flight testing. The role requires hands-on hardware experience, CAD proficiency, and analytical skills for pressure, flow, and thermal analyses, in demanding space environments.

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 and thermal-fluid modeling.
• Hands‑on experience taking hardware from design through build and test.
• Proficiency with CAD tools (NX, CATIA, or SolidWorks).

Responsibilities

• Design valves for propellant, pressurant, and thermal fluid systems.
• Develop fluid storage hardware from concept through qualification.
• Design fluid routing architecture for integration.
• Own fluid subsystem layout and integration across systems.
• Perform hydraulic and pneumatic analysis to size components and verify performance.
• Perform structural analysis (FEA, hand calcs) and validate with test data.
• Select materials compatible with propellants and environments.
• Create detailed drawings, specs, and interface control documents.
• Support component- and system-level test campaigns.
• Collaborate with manufacturing for producibility and rapid iteration.
• Assist vehicle integration and ground system interfaces.
• Contribute to anomaly investigation and design improvements.

Skills

Fluid design

CAD tools

Propulsion fluids

Hands-on experience

Analytical modeling

Education

Bachelor's degree in Mechanical, Aerospace, Chemical or related engineering

Tools

NX

CATIA

SolidWorks

Job description

Cowboy Space Corp. is seeking a Mechanical Engineer to own the design and development of fluid system hardware for propulsion, fluids, and thermal management on our launch vehicle.

You will design valves, tanks, tubing, and manifolds, and work across the full lifecycle from concept through flight testing. The role requires hands-on hardware experience, CAD proficiency, and analytical skills for pressure, flow, and thermal analyses, in demanding space environments.