Senior Mechanical Engineer — End-to-End NPI & DfR Leader

Heirloom is seeking a Senior Mechanical Engineer to own the design and execution of complex subsystems, shaping economics, reliability, and scale. You will guide early R&D through NPI and site deployment with a bias toward manufacturable solutions.

You’ll challenge assumptions, weigh tradeoffs, and drive designs with a focus on cost, reliability, and long-term operability. This is a high-ownership role with technical leadership.