Senior R&D Mechanical Technician

Base pay range

$36.00/hr - $51.00/hr

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 is rapidly scaling for international expansion.

We are seeking enthusiastic and resourceful individuals with a strong mechanical background to join our growing Research & Development team as R&D Technicians. In this role, you will be instrumental in the development of our innovative generator technology, working closely with our talented engineering team at our dedicated R&D Center of Excellence in Menlo Park. You will experiment, build prototypes, and contribute directly to bringing affordable, dispatchable, and clean energy to the world.

Mainspring offers full benefits, including vacation, sick time, 401(k), pre‑IPO stock options, and ample opportunities for professional growth.

• Dive headfirst into the exciting world of next‑gen high‑efficiency generator development, collaborating with a dynamic build and test team to push the boundaries of energy technology.
• Leverage your mechanical prowess and unique skills to construct cutting‑edge components and assemblies for our generators, following procedures while also identifying opportunities for innovation.
• Join forces with our talented engineers to troubleshoot, repair, and even reimagine components and assemblies, directly influencing the evolution of our designs.
• Become a detective of mechanical systems, conducting thorough inspections of test units and meticulously documenting your findings.
• Partner with your fellow innovators to proactively identify and implement improvements that enhance both the safety and efficiency of our groundbreaking work.

• Minimum of 4 to 6+ years of hands‑on experience with mechanical assembly and/or repair. Experience with automotive or heavy equipment assembly is a plus.
• Proven ability to learn quickly, a strong sense of self‑motivation, and a demonstrated commitment to safety.
• Experience with precision measuring instruments, capable of measurements down to .001", using tools such as micrometers, bore gauges, and gauge blocks.
• Metal fabrication skills are considered a plus.
• Possession of a Class A Commercial Driver's License (CDL) from the state of California is a plus.

Mid‑Senior level

Full‑time

Management and Manufacturing

Electric Power Generation

Mainspring Energy, Inc. is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.