Mechanical Design Engineer

H9 are currently partnering with an innovative, rapidly growing aviation company based in Long Beach, California who are looking to recruit a Mechanical Design Engineer with an emphasis on propulsion systems.

Role Description

We are looking for a Mechanical Design Engineer with 3-8 years of experience to own the mechanical design and integration of propulsion components on a hybrid-electric VTOL aircraft that is on the cusp of transitioning from prototype flight testing to customer delivery.

You'll join a lean, high-impact propulsion team responsible for the entire powertrain—high-speed generators, motors, inverters, turbines, battery packs, and cooling systems.

This is a hands-on role where you'll take real ownership of critical flight hardware, driving designs from concept through build, test, and iteration. The ideal candidate can operate independently, has experience resolving real-world build and test issues, and is excited to shape propulsion systems that will scale into production.

What will you be doing?

• Own the mechanical design and integration of propulsion subsystems including motors, high-speed generators, inverters, engine-generator coupling, ducting, and cooling systems
• Drive resolution of hardware issues discovered during prototype builds and testing—tolerance stack-ups, fitment issues, and non-conforming parts
• Contribute to a new in-house motor design cycle from concept through detailed design, testing, and validation
• Perform DFM trade studies and work with suppliers on manufacturing feasibility, primarily involving machining and additive processes
• Collaborate cross-functionally with electrical, manufacturing, test, and flight teams to package and integrate propulsion components into the aircraft

Tech Stack

NX (preferred), SolidWorks, 3D CAD, FEA, GD&T, Teamcenter (PLM).

What is on offer?

• Salary- $135,000-$160,000 per annum
• Equity Options
• Strong benefits package