## The role
Hop Aero is hiring a Propulsion Mechanical Engineer to own the development of e-pumps and other mechanical systems for rocket propulsion at Hop Aero.
## What you will own
- Serve as the responsible engineer for all electric-pump and associated high-speed rotating-machinery matters.
- Design propulsion component interfaces and sealing surfaces such as flanges and mounting points.
- Design pump mechanical components, including impellers, inducers, volutes, housings, shafts, bearings and seals.
- Integrate motors, inverters, controllers and associated electrical systems.
- Perform hydraulic, cavitation, rotordynamic, structural and thermal analyses.
- Define mechanical, fluid, electrical and software interfaces with the engine and vehicle teams.
- Develop cost-effective manufacturing and supplier strategies.
- Plan and execute e-pump testing.
- Own electric-pump risks through design reviews and test-readiness reviews.
## Requirements
- Demonstrated ability to execute in a similar role.
- 5–10 years of relevant experience with centrifugal pumps, high-speed rotating equipment, or other relevant fluid machinery.
- Strong understanding of pump hydraulics, cavitation, rotordynamics, bearings, seals, and balancing.
- Experience handling commonly used rocket propellants, including both storable and cryogenic.
- Experience designing, building, and testing rotating hardware.
- Experience working directly with machine shops and manufacturing suppliers.
- Ability to interpret pressure, flow, vibration, temperature, current, and speed data.
- Ability to work directly with propulsion, fluids, avionics, manufacturing, and test teams.
- Willingness to be highly hands-on in a small, fast-moving hardware organization.
## Nice-to-have
- Experience integrating high-power-density motors and inverters.
- Experience with high-speed rotating equipment including shafts, seals, and bearings.
- Experience with additively manufactured impellers, volutes, or housings.
- Experience transitioning development hardware into repeatable flight hardware.
- Prior work at a fast-moving startup.
**Hop Aero will only consider U.S. persons as defined by ITAR for this role. Hop Aero will not sponsor visas for this role.**
Visa sponsorship is not available for this role.
