Director / Senior Director of Accounting

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

THE OPPORTUNITY

This is a rare opportunity to build and scale an accounting organization at a pivotal stage of growth. Reporting to the VP of Finance & Corporate Controller, the Director of Accounting will be the senior operational accounting leader responsible for transforming the close process, strengthening accounting operations, enhancing audit readiness, and building the infrastructure required to support a rapidly growing business. We’re not looking for someone to simply maintain existing processes. We’re looking for a leader who has built scalable accounting operations before and knows how to establish the rigor, accountability, and discipline required in a high-growth environment. The ideal candidate combines strong operational accounting expertise with a passion for process improvement, automation, and team development.