<div><b style="font-size:18px;">Company Overview</b></div><div><br></div><div><span style="font-size:16px;">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.</span></div><div><br></div><div><span style="font-size:16px;">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. </span></div><div><br></div><div><span style="font-size:16px;">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.</span></div><div><br></div><div><span style="font-size:16px;">We are looking to build relationships with people who share our values:</span></div><div><br></div><div><b style="font-size:16px;">Pragmatic Optimism.</b><span style="font-size:16px;"> 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.</span></div><div><br></div><div><b style="font-size:16px;">Excellence without Ego.</b><span style="font-size:16px;"> 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.</span></div><div><br></div><div><b style="font-size:16px;">Proactive Collaboration.</b><span style="font-size:16px;"> 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.</span></div><div><br></div><div><span style="font-size:16px;">More information can be found at </span><a style="font-size:16px;" href="http://www.mainspringenergy.com/">www.mainspringenergy.com</a></div><div><br></div><div><b style="font-size:18px;">Job Overview</b></div><div><br></div><div><span style="font-size:16px;">The technology that powers Mainspring’s Linear Generator is unlike any other generator technology on the market. The Linear Generator relies on innovative electrical power and control hardware systems to achieve its best-in-class efficiency while meeting the world’s strictest emissions requirements. These electrical hardware systems are designed by a talented team of electrical engineers that own hardware design from initial concept through test and manufacturing.</span></div><div><br></div><div><span style="font-size:16px;">We have a highly impactful opportunity for an electrical engineer to be part of the team that is responsible for the Linear Generator’s power delivery and integration into customers’ power systems. </span></div><br><br><h3>Responsibilities</h3><ul><li>Drive the integration of inverters into broader power systems, with familiarity across diverse system architectures</li><li>Lead the troubleshooting and root cause analysis of complex hardware issues arising in the field, lab, or during testing of grid forming and following inverters and AC power systems</li><li>Design the critical electrical systems that enable key functions and ever-expanding features of the Linear Generator</li><li>Become an expert on the power hardware subsystems that you own from concept to deployment in both AC and DC microgrid applications</li><li>Develop and execute comprehensive testing plans for inverters, microgrid systems, and integrated power subsystems, ensuring robust performance and compliance with design specification</li><li>Perform critical design reviews and collaborate cross-functionally with mechanical, thermal, controls, and software engineers to ensure holistic system performance and manufacturability</li></ul><h3>Qualifications </h3><ul><li>Bachelor's or Master's degree in Electrical Engineering or a related field.</li><li>5+ years of hands-on experience in the design, development, and testing of high-voltage power systems, specifically grid-tie inverters or similar AC power systems</li><li>A “collaborate-first” mindset and ability to communicate across a range of disciplines and personalities</li><li>Deep expertise in AC circuit analysis, waveform interpretation, and power quality diagnostics for 50/60hz systems, including identifying harmonics, transients, and other anomalies. </li><li>Hands-on experience using an oscilloscope, multimeter and other test instruments to measure electrical parameters such as voltage, current, frequency</li><li>Lab safety training to work on 400 to 800VAC and 1500VDC equipment, including LOTO and PPE awareness</li></ul><h3>Bonus</h3><ul><li>Demonstrated experience in the development, deployment, or optimization of grid-scale energy projects</li><li>Proven expertise in the design, integration, or testing of high-voltage battery systems, including comprehensive knowledge of BMS operation and critical parameters</li><li>Direct experience working with SEL relays for protection and control in power systems</li></ul><br><div><span style="font-size:16px;">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.</span></div><div><br></div><div><span style="font-size:16px;">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.</span></div><div><br></div><div><span style="font-size:16px;">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.</span></div>

<p class="text-steel f-b1 md-max:mb-d">At Mainspring we believe the fastest path to the net-zero carbon grid is vastly increasing the amount of solar and wind power while building a supporting clean energy system that ensures affordability and multi-day, cross-season resilience. Getting there requires flexible, scalable, local technologies that can adapt to the shifting grid landscape &ndash; including the transition from natural gas to renewable fuels like biogas, green ammonia, and green hydrogen.</p>
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<p class="text-steel f-b1">The Mainspring Linear Generator delivers an unmatched level of flexibility for the transition ahead. It&rsquo;s local so you can site where power is needed, it&rsquo;s dispatchable so you can ramp up and down to complement renewables, and it&rsquo;s fuel-flexible so you can operate on the cleanest fuels available today and in the future. Our products are already at work at Fortune 500 customer sites, accelerating the arrival of the net-zero carbon grid.</p>
</div>

Senior Electrical Engineer, Inverter Systems Engineer

<div><b>Company Overview</b></div><div><br></div><div><span>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.</span></div><div><br></div><div><span>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. </span></div><div><br></div><div><span>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.</span></div><div><br></div><div><span>We are looking to build relationships with people who share our values:</span></div><div><br></div><div><b>Pragmatic Optimism.</b><span> 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.</span></div><div><br></div><div><b>Excellence without Ego.</b><span> 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.</span></div><div><br></div><div><b>Proactive Collaboration.</b><span> 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.</span></div><div><br></div><div><span>More information can be found at </span><a href="http://www.mainspringenergy.com/">www.mainspringenergy.com</a></div><div><br></div><div><b>Job Overview</b></div><div><br></div><div><span>The technology that powers Mainspring’s Linear Generator is unlike any other generator technology on the market. The Linear Generator relies on innovative electrical power and control hardware systems to achieve its best-in-class efficiency while meeting the world’s strictest emissions requirements. These electrical hardware systems are designed by a talented team of electrical engineers that own hardware design from initial concept through test and manufacturing.</span></div><div><br></div><div><span>We have a highly impactful opportunity for an electrical engineer to be part of the team that is responsible for the Linear Generator’s power delivery and integration into customers’ power systems.&nbsp;</span></div><br><br><h3>Responsibilities</h3><ul><li>Drive the integration of inverters into broader power systems, with familiarity across diverse system architectures</li><li>Lead the troubleshooting and root cause analysis of complex hardware issues arising in the field, lab, or during testing of grid forming and following inverters and AC power systems</li><li>Design the critical electrical systems that enable key functions and ever-expanding features of the Linear Generator</li><li>Become an expert on the power hardware subsystems that you own from concept to deployment in both AC and DC microgrid applications</li><li>Develop and execute comprehensive testing plans for inverters, microgrid systems, and integrated power subsystems, ensuring robust performance and compliance with design specification</li><li>Perform critical design reviews and collaborate cross-functionally with mechanical, thermal, controls, and software engineers to ensure holistic system performance and manufacturability</li></ul><h3>Qualifications </h3><ul><li>Bachelor's or Master's degree in Electrical Engineering or a related field.</li><li>5+ years of hands-on experience in the design, development, and testing of high-voltage power systems, specifically grid-tie inverters or similar AC power systems</li><li>A “collaborate-first” mindset and ability to communicate across a range of disciplines and personalities</li><li>Deep expertise in AC circuit analysis, waveform interpretation, and power quality diagnostics for 50/60hz systems, including identifying harmonics, transients, and other anomalies.&nbsp;</li><li>Hands-on experience using an oscilloscope, multimeter and other test instruments to measure electrical parameters such as voltage, current, frequency</li><li>Lab safety training to work on 400 to 800VAC and 1500VDC equipment, including LOTO and PPE awareness</li></ul><h3>Bonus</h3><ul><li>Demonstrated experience in the development, deployment, or optimization of grid-scale energy projects</li><li>Proven expertise in the design, integration, or testing of high-voltage battery systems, including comprehensive knowledge of BMS operation and critical parameters</li><li>Direct experience working with SEL relays for protection and control in power systems</li></ul><br><div><span>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.</span></div><div><br></div><div><span>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.</span></div><div><br></div><div><span>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.</span></div>

Senior Electrical Engineer, Inverter Systems Engineer

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About the Company

Mainspring Energy

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