Senior Field Service Technician; Indiana

Company Overview

Mainspring Energy is revolutionizing power generation with the world’s most flexible and adaptable local power generation technology, the Mainspring Linear Generator. Commercial, industrial, and utility leaders are choosing Mainspring over traditional options like engines, turbines, and fuel cells to quickly and reliably deliver local power for EV charging, commercial facilities, data centers, and grid‑scale operations. The Mainspring Linear Generator is fuel flexible, ramps up and down to meet demand, and utilizes a flameless reaction with near‑zero NOx emissions.

Backed by top-tier investors including Khosla Ventures, Bill Gates, American Electric Power, Lightrock, and General Catalyst, Mainspring designs, manufactures and delivers its products to customers across the U.S. today, and we’re quickly scaling for international expansion.

Inspired by our vision of the affordable, reliable, net‑zero carbon grid, Mainspring is rapidly expanding within the $816B global electricity equipment market, and we’re hiring the best talent to meet growing customer demand around the globe. We welcome a broad range of backgrounds, experiences, and talents to bring fresh perspectives and ongoing innovation to our customers.

We are looking to build relationships with people who share our values:

• Pragmatic Optimism. Building a new category of world‑class power generation requires the optimism of ambition and creativity, balanced with practicality to solve problems efficiently. The challenges that arise are opportunities for growth.
• Excellence without Ego. We bring expertise and commitment to creating the best customer experience, from sales to deployment and service, just as we apply deep technical rigor to building and delivering world‑class products. We strive for excellence and behave as leaders with the humility to acknowledge our challenges, both collectively and as individual contributors.
• Proactive Collaboration. The integration and cross‑disciplinary nature of Mainspring’s business requires intentionally seeking out others who bring different skills, perspectives, and priorities. Our culture of inclusion and respect extends beyond our team to interactions with our partners and customers.

More information can be found at

We are searching for highly motivated, mechanically inclined individuals to join our growing Field Service team. In this position, you will play a direct role in completing planned and reactive service operations on our generators. You will play a key role in maintaining system uptime, availability, and performance for deployed units on customer sites in a specific region. You will train at our headquarters in Menlo Park, CA, and be assigned to a particular service region requiring travel.

For those inclined, there are ample growth opportunities within Mainspring, and we offer full benefits, including vacation and sick time, 401K, and pre‑IPO stock options.

• Mechanically repair and/or perform maintenance on components and assemblies that make up our generators in accordance with procedures and build checklists in order to meet customer requirements.
• Collaborate with engineers to fix, repair, and redesign components and assemblies.
• Conduct mechanical inspections of deployed units, documenting condition information for use by our team for debugging or troubleshooting.
• Be available to work rotational on‑call shifts, as per the written schedule, to provide optimal service and support for our customers.

• Minimum of 5 years of experience with mechanical assembly and/or repair. Experience with automotive, aviation, and/or heavy equipment (i.e., HVAC, elevators/lifts, or industrial equipment) assembly is a plus.
• Experience with precision measuring, down to .001“, using micrometers, bore gauges, gauge blocks, etc. Also, familiarity with torque wrenches and documentation of repairs performed.
• Candidates must be able to stand for long periods of time, lift up to 50 lbs., and wear required PPE.
• Must have knowledge of how to use and maintain basic tools, such as torque wrenches and torque specifications.
• Must have experience with following written and verbal…