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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 Job Overview The Linear Generator is a sophisticated, automated, and integrated system spanning a wide range of engineering disciplines including thermodynamics, mechanical, electrical, software, and controls. This position will lead the operation and execution of experiments on our Linear Generators as part of Mainspring’s test engineering team. This includes hands-on work and remote operation of our Linear Generator qualification units, debugging, and data analysis aimed at qualifying new changes and reliability of our product. This position will require travel up to 30% time to our testing site in Houston, Texas.  We are looking for an open-minded, curious, and highly motivated Test Engineer to join our dynamic test engineering team. You will lead critical sub-system and system-level validation and reliability tests on new releases of our product. This role will require strong collaboration across the entire engineering and business organization.