Senior Mechanical Engineer - Thermal / Fluids Hardware DesignSenior Mechanical Engineer - Thermal / Fluids Hardware Design 6 days ago Be among the first 25 applicants Get AI-powered advice on this job and more exclusive features. This range is provided by Mainspring Energy. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range $126,000.00/yr - $148,000.00/yr Company Overview Mainspring Energy is revolutionizing power generation with the world’s most flexible and adaptable onsite power generator, the Mainspring Linear Generator. Commercial, industrial, and utility leaders are choosing Mainspring over traditional options like engines, turbines, and fuel cells to quickly and reliably deliver local power for EV charging, commercial facilities, data centers, and grid-scale operations. The Mainspring Linear Generator is fuel flexible, ramps up and down to meet demand, and utilizes a flameless technology with near-zero NOx emissions. Backed by top-tier investors such as Khosla Ventures, Bill Gates, American Electric Power, and Lightrock, Mainspring designs, manufactures and delivers its products to customers across the U.S. today, and we’re quickly scaling for international expansion. Inspired by our vision of the affordable, reliable, net-zero carbon grid, Mainspring is rapidly expanding within the $816B global electricity equipment market, and we’re hiring the best talent to meet growing customer demand around the globe. We welcome a broad range of backgrounds, experiences, and talents to bring fresh perspectives and ongoing innovation to our customers. We are looking to build relationships with people who share our values: Pragmatic Optimism. Building a new category of world-class power generation requires the optimism of ambition and creativity, balanced with practicality to solve problems efficiently. The challenges that arise are opportunities for growth. Excellence without Ego. We bring expertise and commitment to creating the best customer experience, from sales to deployment and service, just as we apply deep technical rigor to building and delivering world-class products. We strive for excellence and behave as leaders with the humility to acknowledge our challenges, both collectively and as individual contributors. Proactive Collaboration. The integration and cross-disciplinary nature of Mainspring’s business requires intentionally seeking out others who bring different skills, perspectives, and priorities. Our culture of inclusion and respect extends beyond our team to interactions with our partners and customers. More information can be found at www.mainspringenergy.com Job Overview Mainspring is seeking Senior Level Mechanical Engineers with a focus on designing hardware that requires thermal and fluids analysis. In this role, you will design hardware for air and liquid handling systems. The Engineer will develop new concepts and manage existing concepts through development, deployment, and manufacturing. Mainspring is a great place for engineers with a variety of areas of deep expertise, who like to solve challenging cross-functional problems with a mix of computational analysis, hands-on engineering and team effort. Company Overview Mainspring Energy is revolutionizing power generation with the world’s most flexible and adaptable onsite power generator, the Mainspring Linear Generator. Commercial, industrial, and utility leaders are choosing Mainspring over traditional options like engines, turbines, and fuel cells to quickly and reliably deliver local power for EV charging, commercial facilities, data centers, and grid-scale operations. The Mainspring Linear Generator is fuel flexible, ramps up and down to meet demand, and utilizes a flameless technology with near-zero NOx emissions. Backed by top-tier investors such as Khosla Ventures, Bill Gates, American Electric Power, and Lightrock, Mainspring designs, manufactures and delivers its products to customers across the U.S. today, and we’re quickly scaling for international expansion. Inspired by our vision of the affordable, reliable, net-zero carbon grid, Mainspring is rapidly expanding within the $816B global electricity equipment market, and we’re hiring the best talent to meet growing customer demand around the globe. We welcome a broad range of backgrounds, experiences, and talents to bring fresh perspectives and ongoing innovation to our customers. We are looking to build relationships with people who share our values: Pragmatic Optimism. Building a new category of world-class power generation requires the optimism of ambition and creativity, balanced with practicality to solve problems efficiently. The challenges that arise are opportunities for growth. Excellence without Ego. We bring expertise and commitment to creating the best customer experience, from sales to deployment and service, just as we apply deep technical rigor to building and delivering world-class products. We strive for excellence and behave as leaders with the humility to acknowledge our challenges, both collectively and as individual contributors. Proactive Collaboration. The integration and cross-disciplinary nature of Mainspring’s business requires intentionally seeking out others who bring different skills, perspectives, and priorities. Our culture of inclusion and respect extends beyond our team to interactions with our partners and customers. More information can be found at www.mainspringenergy.com Job Overview Mainspring is seeking Senior Level Mechanical Engineers with a focus on designing hardware that requires thermal and fluids analysis. In this role, you will design hardware for air and liquid handling systems. The Engineer will develop new concepts and manage existing concepts through development, deployment, and manufacturing. Mainspring is a great place for engineers with a variety of areas of deep expertise, who like to solve challenging cross-functional problems with a mix of computational analysis, hands-on engineering and team effort. Responsibilities Lead and participate in brainstorming activities to develop novel ways to improve all aspects of the Linear Generator Develop and optimize key thermal subsystems of the Linear Generator to drive down cost, improve performance, and deliver high reliability Lead projects, and project teams, within the thermal subsystems and contribute to projects in other subsystems Work with reliability and test teams to validate systems and components with fast cycles of learning for deployment into the next generation of Linear Generators Collaborate cross-functionally with manufacturing engineering, NPI, and external suppliers to rapidly deploy new designs into production Qualifications BS Degree in Mechanical Engineering or a similar engineering field from an accredited institution + 5 years of relevant industry experience or MS + 4 years of relevant industry experience Direct experience designing air or liquid handling systems, with demonstrated engineering fundamentals in thermo-fluid system design Fluent in SolidWorks or comparable CAD package. Experience with using PDM or a similar CAD version control system is preferred Experience with finite element analysis (structural, thermal, or fluids) Familiarity with 1D or 3D thermal systems design simulation tools Experience working with suppliers to develop and qualify new components Experience with various manufacturing processes such as sheet metal forming, machining, and plastics molding and forming. Demonstrated attention to detail with the ability to generate and review design documentation, bill of materials, work instructions and test plans and reports Experience utilizing GD&T is ideal Ability to work independently, manage multiple projects in a fast-paced environment, and demonstrate leadership and mentoring abilities Experience leading projects through a full design lifecycle from concept through manufacturing support is preferred Interest in developing creative and cost effective solutions to enable the deployment of zero carbon energy technology at large scale

Scroll down to find an indepth overview of this job, and what is expected of candidates Make an application by clicking on the Apply button. Does 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.

This position is onsite at our Menlo Park HQ. The salary will be adjusted to reflect local market conditions based on employee location as well as the experience of the employee. Along with the base salary, Mainspring offers pre-IPO stock options + benefits.Seniority level Seniority levelMid-Senior level Employment type Employment typeFull-time Job function Job functionEngineering and Information Technology IndustriesElectric Power Generation Referrals increase your chances of interviewing at Mainspring Energy by 2x Sign in to set job alerts for “Senior Mechanical Engineer” roles.Mechanical Manufacturing Engineering Manager II Sunnyvale, CA $165,000.00-$245,000.00 2 weeks ago Manager, Mechanical Engineering/Automation San Francisco Bay Area $150,000.00-$180,000.00 1 month ago Sunnyvale, CA $168,900.00-$298,000.00 2 weeks ago Principle Mechanical Engineer – Neuromodulation (Neurostimulators)Sr. Manager, Mechanical Design Engineering, Energy Union City, CA $154,000.00-$202,000.00 3 weeks ago Sunnyvale, CA $145,600.00-$246,500.00 2 days ago Sunnyvale, CA $170,000.00-$240,000.00 2 weeks ago Sunnyvale, CA $145,600.00-$246,500.00 1 day ago Sunnyvale, CA $204,000.00-$281,000.00 2 weeks ago Sr. Mechanical Design Engineer - Wafer Chucks & Wafer Positioning Stages Santa Clara, CA $185,000.00-$254,000.00 1 day ago Santa Clara, CA $168,000.00-$271,400.00 1 day ago Senior Mechanical Engineer, Valves & Fluid SystemsSenior Mechanical Engineer - Low Voltage Electronics Santa Clara, CA $168,000.00-$271,400.00 1 day ago Milpitas, CA $140,700.00-$239,200.00 2 weeks ago Sr. Mechanical Design Engineer, Structures, Drive Systems, SemiSr. Mechanical Design Engineer, Power ElectronicsSenior Mechanical Engineer (Vision Equipment) Sunnyvale, CA $129,000.00-$218,300.00 2 weeks ago Senior Design and Simulation Engineer (HIL) San Francisco Bay Area $160,000.00-$240,000.00 2 weeks ago R&D Engineer, Detector Design, Model, and AnalysisSenior Manager, Mechanical Engineering - Interior Systems Fremont, CA $156,000.00-$198,000.00 1 day ago San Jose, CA $185,000.00-$225,000.00 14 hours ago San Jose, CA $240,000.00-$280,000.00 1 week ago Senior Mechanical Engineer – Interconnect Design San Jose, CA $125,000.00-$140,000.00 1 week ago Senior Mechanical Engineer – MechatronicsSenior Quality Engineer (Design Controls and V&V) Sunnyvale, CA $126,100.00-$213,500.00 2 weeks ago We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.

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