Senior Electrical Systems & Sustaining Engineer

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, Next Era 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

Are you a systems-level thinker who thrives on untangling complex hardware mysteries? Do you prefer the thrill of deeply investigating and solving structured, multi-domain problems over routine schematic drafting? Mainspring Energy is looking for a highly autonomous, intellectually curious Senior Electrical Systems & Sustaining Engineer to anchor a brand-new sub-team within our Electrical Engineering (EE) organization. Unlike traditional sustaining roles confined to component obsolescence paperwork, this is a high-visibility engineering position built for an organizational anchor and leader.

As the inaugural member of this sub-team, you will have the execution autonomy to establish the foundational sustaining framework for the entire EE department, creating a blueprint for the team’s future expansion.

At Mainspring, we are pioneering a new category of fuel-flexible power generation to enable a clean, reliable, and affordable electric grid. As we scale production and rapidly expand our commercial fleet, maintaining flawless hardware integrity is vital to our mission. In this role, you will step in as the technical execution lead for problem resolution across all electrical domains—spanning from low-voltage electronics to complex power conversion systems—acting as the operational shield for our core design groups.

This position is ideal for an electrical expert who enjoys working on complex systems and has a keen eye for detail.

• CAPA Leadership & Escalation Ownership
  :
  Serve as the single point of contact for all EE Corrective and Preventive Action (CAPA) issues. Take charge of investigating fleet issues, establishing immediate containment paths, and driving permanent resolutions
• Hands‑on Lab Diagnostic Validation
  :
  Conduct intensive hands‑on electrical lab bench testing to reproduce fleet and manufacturing anomalies. Utilize standard laboratory diagnostic equipment (oscilloscopes, digital multimeters, power supplies, logic analyzers, and electronic loads) to validate containment strategies and prove out root‑cause theories
• Root Cause & Failure Analysis
  :
  Lead end‑to‑end problem resolution spanning from initial telemetry data parsing to deep‑dive root cause analysis. Partner closely with our internal Failure Analysis (FA) experts to diagnose complex electronics and hardware system failures
• Design Ownership for Reliability
  :
  Directly drive the continuous improvement of our deployed hardware ecosystem. You will have the technical authority to own and execute the engineering change lifecycle—from designing and releasing targeted PCBA revisions to identifying, testing, and qualifying strategic off‑the‑shelf (OTS) components—to permanently eliminate failure modes and improve system performance
• Cross‑Functional Tiger Team Representative
  :
  Act as the authoritative EE voice on the cross‑functional CAPA Tiger Team. Interface daily with Core Reliability, Mechanical, Software, and Manufacturing teams to ensure a unified approach to system‑level reliability
• Technical Triage & Strategy
  :
  Function as the primary gatekeeper for incoming electrical engineering challenges. For specialized issues, triage, prioritize, and collaboratively map out resolution strategies with design specialists across the EE department
• Metrics & Infrastructure Management
  :
  Own and optimize the EE Atlassian/Jira Problem dashboard. Systematically track, analyze, and report on key performance indicators (e.g.,…