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Mainspring Energy

Senior Staff Mechanical Engineer - Electromechanical

Menlo Park, CA

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hirly's read of this role

Seniority
Lead / management
Stated salary
$185,000 – $225,000 per year
Country
US
Work mode
On-site / unstated
First seen by hirly
21 Sept 2026

Derived automatically from the posting. Upload your resume above to see how the role scores against it.

the posting

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

Mainspring is looking for a Senior Staff Mechanical Engineer — Electromechanical to lead the design and integration of electrical enclosures, busbars, and cable systems for our next-generation energy platforms.

This is a highly visible technical leadership role focused on solving difficult real-world engineering problems across power electronics packaging, harsh-environment durability, manufacturability, and system integration. You’ll help shape core product architecture while working on systems deployed across demanding operating environments ranging from coastal and desert conditions to future megawatt-scale applications.

We’re looking for an engineer who understands how electrical and mechanical systems behave in the real world — and can drive robust electromechanical solutions from concept through production.

Original posting on Mainspring Energy's site ↗

Listed on hirly, a job board. hirly is not the employer: Mainspring Energy is hiring for this role.

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