# Senior Reaction Controls Engineer at Mainspring Energy

- Company: Mainspring Energy
- What the company does: Local power generation for data centers, utilities, industrial & enterprise applications. Fuel-flexible, fast to deploy, high-efficiency, low NOx power. Backed by General Catalyst and Khosla.
- Company website: https://www.mainspringenergy.com/
- Type: Startups
- Level: Senior
- Location: Menlo Park, CA
- Work setup: Hybrid
- Pay: $134K to $159K base salary per year (USD)
- Posted: 2026-09-17
- Apply by: 2026-11-01
- Apply: https://jobs.lever.co/mainspringenergy/cf13360c-e88d-4f3a-be61-f252498292fd
- Page: https://www.1752.vc/careers/jobs/mainspring-energy-senior-reaction-controls-engineer/

## About the role

Do you love thermodynamics and dynamic system control? Have you thought about thermodynamic cycles as both continuous and discrete dynamic systems? As other industries convert their thermodynamic machines to electromagnetic machines and electrify their platforms, would you like to help generate that clean electricity?

## What they're looking for

- Driven and self-directed enthusiastic contributor
- Excellent communicator with demonstrated collaboration across multidisciplinary teams
- Multiple years of experience designing, implementing, and testing algorithms in thermodynamic machines - experience with engines is a plus
- BS + 5 years relevant experience, MS + 3 years, or Ph.D. in mechanical engineering or related degree

Tags: On product SW and Sys Engr