Senior Electrical Systems & Sustaining Engineer

About Mainspring

Mainspring Energy manufactures and delivers fuel-flexible, low-emissions local power solutions that rapidly add new capacity and deliver reliable, affordable, and sustainable electric power. The company began commercial shipments of its Mainspring Linear Generators in 2020 and today has hundreds of megawatts in advanced development and field operations for leading Fortune 500 companies, data centers, and utilities. Mainspring also partners with global energy leaders including AEP, NextEra Energy Resources, Schneider Electric, and more. The core values that ground our work, guide our decisions, and connect us together: Pragmatic Optimism Excellence without Ego Proactive Collaboration

About the Role

Are you a systems-level thinker who thrives on untangling complex hardware mysteries? Do you prefer the thrill of deeply investigating and solving structured, multi-domain problems over routine schematic drafting? Mainspring Energy is looking for a highly autonomous, intellectually curious Senior Electrical Systems & Sustaining Engineer to anchor a brand-new sub-team within our Electrical Engineering (EE) organization.  Unlike traditional sustaining roles confined to component obsolescence paperwork, this is a high-visibility engineering position built for an organizational anchor and leader. As the inaugural member of this sub-team, you will have the execution autonomy to establish the foundational sustaining framework for the entire EE department, creating a blueprint for the team's future expansion. Job Overview At Mainspring, we are pioneering a new category of fuel-flexible power generation to enable a clean, reliable, and affordable electric grid. As we scale production and rapidly expand our commercial fleet, maintaining flawless hardware integrity is vital to our mission. In this role, you will step in as the technical execution lead for problem resolution across all electrical domains—spanning from low-voltage electronics to complex power conversion systems—acting as the operational shield for our core design groups. This position is ideal for an electrical expert who enjoys working on complex systems and has a keen eye for detail.