<h3>About Mainspring</h3><p>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.</p><p>The <a href="https://www.mainspringenergy.com/company"><span style="color:#3598db;"><span style="text-decoration:underline;">core values</span></span></a> that ground our work, guide our decisions, and connect us together:</p><ul><li>Pragmatic Optimism</li><li>Excellence without Ego</li><li>Proactive Collaboration</li></ul><div><br></div><h3>Job Overview</h3><p>The Senior Sales Engineer reports to the Senior Sales Engineering Manager and serves as a senior technical contributor within the sales cycle for solution architecture, estimating, and system integration strategy.</p><p>As a member of the Sales Engineering team (a subset of Project Delivery), this role exercises independent technical judgment to develop cost-optimized, execution-ready solutions aligned with Mainspring’s linear generator capabilities. The Senior Sales Engineer is accountable for architectural integrity, commercial rigor, and seamless transition from concept through execution.</p><br><br><h3>Responsibilities</h3><ul><li>Develop system architecture, preliminary designs, and cost estimates from concept through execution handoff</li><li>Articulate and support sound technical approaches, ensuring appropriate design integration and tradeoff evaluation</li><li>Produce complete, accurate, and timely proposal packages across multiple concurrent projects</li><li>Build well-supported cost estimates, proactively communicate risks, and incorporate market inputs into pricing assumptions</li><li>Support customer meetings, site walks, and solution presentations as the technical subject matter expert</li><li>Communicate technical concepts in clear, structured, and solution-oriented formats across customer and internal stakeholders</li><li>Collaborate with Engineering, Product, Controls, Commissioning, and Project Management to support technical feasibility and execution alignment</li><li>Contribute to peer design reviews to share technical perspective and strengthen overall solution quality</li></ul><h3>Qualifications</h3><ul><li>Bachelor’s degree in Electrical/ Mechanical/ Systems/ Energy Engineering</li><li>7+ years of experience in sales engineering, applications engineering, front-end engineering development (FEED) or cost estimating within electrical power systems or related industries</li><li>Experience in distributed energy, solar, batteries, fuel cells, microgrids, or related technologies preferred</li><li>Familiarity with electrical power systems, three phase inverters, protection relays, and the physics of grid integration</li><li>Strong understanding of standard electrical drawings such as wiring diagrams, electrical schematics, and one-lines</li><li>Ownership Mentality: Proactive in identifying risks and comfortable advocating for the resources needed to solve them</li><li>Ability to travel nationally (~25%)</li></ul><br><p>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.</p><p>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.</p><p>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.</p>

<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 Sales Engineer

<h3>About Mainspring</h3><p>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.</p><p>The <a href="https://www.mainspringenergy.com/company"><span><span>core values</span></span></a> that ground our work, guide our decisions, and connect us together:</p><ul><li>Pragmatic Optimism</li><li>Excellence without Ego</li><li>Proactive Collaboration</li></ul><div><br /></div><h3>Job Overview</h3><p>The Senior Sales Engineer reports to the Senior Sales Engineering Manager and serves as a senior technical contributor within the sales cycle for solution architecture, estimating, and system integration strategy.</p><p>As a member of the Sales Engineering team (a subset of Project Delivery), this role exercises independent technical judgment to develop cost-optimized, execution-ready solutions aligned with Mainspring’s linear generator capabilities. The Senior Sales Engineer is accountable for architectural integrity, commercial rigor, and seamless transition from concept through execution.</p><br /><br /><h3>Responsibilities</h3><ul><li>Develop system architecture, preliminary designs, and cost estimates from concept through execution handoff</li><li>Articulate and support sound technical approaches, ensuring appropriate design integration and tradeoff evaluation</li><li>Produce complete, accurate, and timely proposal packages across multiple concurrent projects</li><li>Build well-supported cost estimates, proactively communicate risks, and incorporate market inputs into pricing assumptions</li><li>Support customer meetings, site walks, and solution presentations as the technical subject matter expert</li><li>Communicate technical concepts in clear, structured, and solution-oriented formats across customer and internal stakeholders</li><li>Collaborate with Engineering, Product, Controls, Commissioning, and Project Management to support technical feasibility and execution alignment</li><li>Contribute to peer design reviews to share technical perspective and strengthen overall solution quality</li></ul><h3>Qualifications</h3><ul><li>Bachelor’s degree in Electrical/ Mechanical/ Systems/ Energy Engineering</li><li>7+ years of experience in sales engineering, applications engineering, front-end engineering development (FEED) or cost estimating within electrical power systems or related industries</li><li>Experience in distributed energy, solar, batteries, fuel cells, microgrids, or related technologies preferred</li><li>Familiarity with electrical power systems, three phase inverters, protection relays, and the physics of grid integration</li><li>Strong understanding of standard electrical drawings such as wiring diagrams, electrical schematics, and one-lines</li><li>Ownership Mentality: Proactive in identifying risks and comfortable advocating for the resources needed to solve them</li><li>Ability to travel nationally (~25%)</li></ul><br /><p>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.</p><p>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.</p><p>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.</p>

Senior Sales Engineer

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About the Company

Mainspring Energy

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