About MainspringMainspring Energy manufactures and delivers fuel-adaptable, 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 **** 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 OptimismExcellence without EgoProactive CollaborationJob OverviewDo you have a knack for design of complex mechanical systems?
Have you ever invented a tool or changed a process just to make routine installation or service faster and easier?
If you're driven by solving real-world design challenges, and working with state of the art mechanical power generation equipment, then this role is built for you.Mainspring Energy is seeking a Mechanical Sustaining Engineer with a focus on design to lead product improvement efforts across our field and production systems.
You will work embedded on site at a contract manufacturer to address design and manufacturing issues at their root.
You will support manufacturing with a hands‐on approach to solve complex dynamic mechanical problems working directly with the product to take measurements, perform testing, and support pilot efforts to develop rework/retrofit processes.
You will redesign critical components for durability and ease of service, and integrate your findings back into the development process to ensure the long‐term reliability and manufacturability of our products.Core ResponsibilitiesLead the root cause analysis of mechanical failures using data from diagnostics, hands‐on testing, and fundamental analysis of bolted joints or material fatigue lifeRedesign or re-engineer components, fasteners, or assemblies to eliminate failures, reduce costs, or improve serviceabilityCoordinate design engineering, manufacturing, and quality teams to ensure that changes are thoroughly tested and validated with short feedback cyclesCollaborate with NPI, manufacturing quality,



and supply chain teams to ensure solutions are optimized for production, vendor capabilities, and field servicePredict and prevent failure modes by applying a deep understanding of mechanical system interactions, tolerance stack‐ups, and real‐world use conditionsImplement feedback loops from field issues into design standards and engineering processes to continuously improve product quality and reduce recurrenceManage internal improvement systems that embed learnings into manufacturing process flow and future design development effortsSupport the development of service tooling, testing fixtures, or diagnostic aids as needed for improved deployment and serviceabilityTravel to HQ in Menlo Park, CA required once per quarterQualificationsBS or MS in Mechanical Engineering or a similar technical field, minimum BS + 11 years mechanical design experienceHands‐on experience with mechanical design, including analysis of bolted joints, stress analysis, and structural integrityHands on experience with component and system level testing including measurement techniques and data analysisProven ability to use data‐driven root‐cause analysis to solve complex, cross‐functional design issues.Experience addressing and resolving field and production issuesKnowledge of DFM/DFA principles and quality system tools (PFMEA, 8D, CAPA, etc.)Deep understanding of tolerance stack‐ups and the use of CMMs in inspection processesFamiliar with manufacturing processes including tube swaging, crimping, potting, stamping, sheet metal, hydroforming, welding, machining, and fabricationProficient in SolidWorks or a comparable CAD package; PDM experience preferredExperience with structural FEA and/or is a plusA passion for building robust, field‐ready solutions with high reliability and serviceabilityWhy Join Us?




Directly influence the reliability and field performance of mission‐critical mechanical systemsCollaborate with top‐tier engineering teams in a fast‐paced and supportive environmentBe part of an innovation‐driven company working on impactful technologiesCompetitive compensation and a full benefits packageOpportunities for technical leadership and long‐term growthJoin Our MissionWe're committed to building a diverse and inclusive team and welcome candidates from all backgrounds.
Even if you don't meet every requirement, if this role resonates with your skills and passions, we encourage you to apply.
$55,000 - $83,000 a yearDoes your experience not meet all of our posted requirements?
Studies have shown that some people are less likely to apply to positions unless they meet every listed requirement.
At Mainspring, we are committed to building a diverse, inclusive, flexible, and collaborative environment, so if you want to help us transition the world to clean and affordable electricity, and don't meet all posted requirements for a particular role, we'd still love to hear from you.
Mainspring can sometimes be flexible enough to shift responsibilities for the right person, or otherwise identify open or upcoming roles that may better fit your professional background.In more traditional words, Mainspring Energy, Inc is an Equal Opportunity Employer.
All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.This compensation and benefits information is based on Mainspring Energy's estimate as of the date of publication and may be modified in the future.
We generally do not negotiate on salary once we have made an offer.
The level of pay within the range will depend on a variety of job‐related factors that may include location, relevant prior experience and/or education, or particular skills and expertise.
New hires joining the company tend to be paid within the starting base pay range noted above, with opportunities to increase pay over time based on development of additional skills, competencies, and company‐specific knowledge.
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📌 Staff Mechanical Engineer – Continuous Improvement For Mechanical Design & Quality Control (Monterrey)
🏢 Mainspring Energy
📍 Monterrey