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Senior Reliability Engineer, Electrical Systems

About Mainspring

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Mainspringenergy Source published Sep 20, 2026 Verified 11 hours ago
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Overview

About Mainspring

Full job description

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 Energy is growing rapidly and has begun to manufacture its Linear Generators in volume, and reliability is a crucial element to the success of the product. The reliability team is responsible for evaluating design risks, and implementing tests and analyses to quantify and reduce risk to an acceptable level for the target market. Reliability engineers will use tools such as FMEA, HALT and root-cause analysis on a regular basis. The successful candidate is highly organized and communicative, and will thrive in a nimble fast-paced environment that includes product engineering, R&D and manufacturing.

Perform reliability testing including mechanical stress tests, shock, vibration and environmental testing

Prepare concise and detailed test plans and reports

Conduct failure analysis using analytical techniques and methodology to derive root cause

Direct and develop design engineers in the implementation of the product performance risk analysis process

Lead cross functional teams executing FMEA for design, process and maintenance

Develop verification test plans with design engineers based on system and sub-system specs and possess the knowledge of system architecture and industry standard protocols

Design, build and run specialized test equipment as required to test unique electrical operating circuits with an emphasis on maximizing test output to obtain results with rapid design cycles

Based on knowledge of UL and NFPA standards, guide cross-functional design team for excellence of design in electrical & fuel system components

Bachelor of Science in Electrical Engineering or Mechanical Engineering

5+ years experience with testing for electrical hardware, PCBA’s or cable assemblies with an emphasis on reliability

Experience working in a dynamic engineering environment, where systems and processes are evolving rapidly

Demonstrated ability to complete challenging multi-system engineering projects

In depth understanding and use of FMEA (Failure Mode and Effects Analysis)

Ability to set up and automate a variety of repetitive testing operations

Data Analysis and reporting capabilities (Python, Matlab, Google Docs, Weibull ++, JMP, etc.)

Experience with CAPA (Corrective Action Preventative Action) type processes (RCA, 8D, etc.), in iterative development to improve products

Strong understanding of electrical system concepts and components

Ability to navigate schematic and PCBA layout using ECad tools (Altium365, Orcad etc.)

Proficiency in use of Oscilloscope, Function Generator and DMM

Understanding of failure characterization and reliability of HV/LV electronics hardware, a plus

Experience using failure analysis techniques such as X-ray, CT, cross-sectioning and optical microscopy, a plus

Experience in compliance testing and knowledge of standards (UL, IEC, etc.), a plus

Strong understanding of mechanical assemblies, a plus

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