Mechanical Engineer - Advanced Manufacturing

Mechanical Engineer - Advanced Manufacturing

Whether you call yourself a mechanical engineer, a manufacturing engineer, or just someone who loves turning designs into hardware, if you want to own how the world’s most advanced electric motors get built, read on.

At H3X, we're building the most advanced electric motors in the world, powering the future of sustainable aviation, marine, industrial, and defense applications. Our motors range from 30 kW to 1 MW+ and are up to 3x lighter than competing platforms, driving a step change in electric propulsion technology.

Our team brings together some of the best minds from aerospace, defense, and motorsports, with deep expertise in electric machines, power electronics, material science, and advanced manufacturing. We’re a small, fast-moving team doing hard engineering that matters, and we’re looking for people who want to do the best work of their careers alongside us.

You’ll have real ownership from day one, direct access to the people making decisions, and the chance to see your work go from whiteboard to hardware, in flight, on the water, or in the field, in a matter of months, not years. We move fast, we learn fast, and we celebrate wins together. You’ve probably worked somewhere that moves fast and builds hard things or you're hungry to.

H3X is hiring Mechanical Engineers focused on advanced manufacturing across all levels (Associate to Staff) to develop and scale our manufacturing processes from early-stage prototypes through full production. You'll do hands‑on process development and production support, bridging R&D and sustained manufacturing so new technologies can be built reliably, efficiently, and 'll take full ownership of a program or production area such as Stator Manufacturing, Rotating Assemblies, or Final Assembly, supporting both new product introductions and production scaling of existing products.

Some positions lean more toward process development; others toward tooling, fixtures, and equipment.

• Develop, prototype, and mature novel manufacturing processes from concept through production deployment.
• Lead manufacturing readiness for new products: process development, work instructions, tooling design, subscale testing, prototype builds, and the transition from prototype to production.
• Own capacity planning and scalability for your production area; find the bottlenecks and implement the equipment, tooling, and workflow improvements that support forecasted demand.
• Design, validate, and deploy production tooling, fixtures, and assembly aids in Solid Works to improve quality, throughput, and operator ergonomics.
• Resolve production issues through root‑cause analysis and drive non‑conformance investigations and CAPA to eliminate recurring defects.
• Build the systems, tooling, and workflows that make the whole team faster: the goal is to save the team time, not add process for its own sake.
• Partner with design, supply chain, quality, and operations to bake manufacturability into the product from the start.

• Degree in Mechanical Engineering or similar (or equivalent hands‑on experience)
• Strong grasp of engineering fundamentals, mechanical drawings, and GD&T
• CAD proficiency, Solid Works preferred
• Bias to action, an ownership mentality, and a first‑principles approach to problems
• Excellent written and verbal communication, strong attention to detail, and high emotional intelligence: you collaborate respectfully and empathetically
• Fundamentally curious and eager to learn quickly

You're a scrappy, hard‑working self‑starter who learns fast, runs toward problems, and would rather build and iterate than wait for perfect instructions. Internship, project, or team experience with real hardware is a plus.

You bring deep manufacturing experience scaling complex assemblies. Just as important, you build systems that save the team time rather than create overhead. You can walk a production area, identify which systemic improvements will actually move the needle, prioritize ruthlessly, and drive them to completion.