# Senior Staff Mechanical 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: On-site
- Pay: $186K to $225K base salary per year (USD)
- Posted: 2026-08-06
- Apply by: 2026-10-08
- Apply: https://jobs.lever.co/mainspringenergy/790e748f-2986-4265-9f33-11f43b49ddce
- Page: https://www.1752.vc/careers/jobs/mainspring-energy-senior-staff-mechanical-engineer/

## About the role

Mainspring is seeking a Senior Staff Mechanical Engineer to shape technical direction across multiple teams, systems, or major program areas within our Linear Generator platform. In this role, you will guide system-level design decisions, resolve complex cross-functional tradeoffs, identify risks that may not be visible within individual projects, and create technical leverage through architecture, standards, validation strategy, and high-quality decision-making.

## What they're looking for

- BS, MS, or PhD in Mechanical Engineering or a similar engineering field, with demonstrated success providing technical leadership across complex mechanical systems, subsystems, or major program areas
- Repeated experience developing, validating, releasing, and improving complex hardware across multiple design cycles, project types, failure modes, and implementation environments
- Strong system-level mechanical judgment, including the ability to balance performance, reliability, cost, manufacturability, serviceability, scalability, safety, schedule, integration, and business priorities
- Demonstrated ability to resolve ambiguous, cross-functional technical problems where ownership, requirements, evidence, or tradeoffs are not initially clear
- Proven ability to use analysis, testing, data, field learning, production learning, and engineering judgment to make or guide high-consequence technical decisions
- Strong communication and influence skills, including the ability to align stakeholders across teams and levels of the organization around technical strategy, risks, tradeoffs, and recommended paths forward

Tags: Mechanical and Structural Systems