Qureos Mentor

Mainspring Energy

<div><h3 class="jobSectionHeader">Company Overview</h3>

Mainspring Energy is revolutionizing power generation with the world&rsquo;s most flexible and adaptable local power generation technology, 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 reaction with near-zero NOx emissions. Backed by top-tier investors including Khosla Ventures, Bill Gates, American Electric Power, Lightrock, and General Catalyst Mainspring designs, manufactures and delivers its products to customers across the U.S. today, and we&rsquo;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&rsquo;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&rsquo;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<div></div><h3 class="jobSectionHeader"> 
Job Overview</h3>
<div>Our Linear Generator is a sophisticated, automated, and integrated system spanning a wide range of engineering disciplines including thermodynamics, mechanical, electrical, software, and controls. We are looking for a driven, highly motivated Product Qualification Test Engineer to join our test engineering team.</div>
<h3 class="jobSectionHeader">Responsibilities</h3><ul>
<li>Perform hands-on work and operate our Linear Generator units, working closely with our end of line team</li>
<li>Qualify cores, units to be shipped to customers sites in our facility in Menlo Park, and support contract manufacturing</li>
<li>Outline and develop testing processes &amp; infrastructure to scale up product qualification tests</li>
<li>Generate, analyze and automate data reports on new units, and work with all engineering teams to identify and root cause issues</li>
<li>In collaboration with our manufacturing testing team, participate in the development of new automation processes to enable the scaling up of qualification testing in manufacturing</li>
</ul><h3 class="jobSectionHeader">Qualifications</h3><ul>
<li>Master&rsquo;s degree in mechanical engineering, electrical engineering, physics, or equivalent with 3+ years of applicable experience</li>
<li>Experience of conducting experimental hardware projects plus if in the context of product qualification or manufacturing test engineering</li>
<li>Experience in project management</li>
<li>Proficiency in programming in at least one language (e.g. Python, MATLAB)</li>
<li>Detail-oriented and comfortable working in a fast-paced environment</li>
<li>Enjoy working in interdisciplinary teams</li>
</ul>
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.
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&rsquo;t meet all posted requirements for a particular role, we&rsquo;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.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.</div>

Test Engineer, Product Qualification

<div><h3 class="jobSectionHeader">Company Overview</h3>

Mainspring Energy is revolutionizing power generation with the world&rsquo;s most flexible and adaptable local power generation technology, 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 reaction with near-zero NOx emissions. Backed by top-tier investors including Khosla Ventures, Bill Gates, American Electric Power, Lightrock, and General Catalyst Mainspring designs, manufactures and delivers its products to customers across the U.S. today, and we&rsquo;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&rsquo;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&rsquo;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<div></div><h3 class="jobSectionHeader"> 
Job Overview</h3>

Mainspring is seeking an R&amp;D Test Engineer who likes to solve challenging cross-functional problems in both a research and production environment. In this role, you will design and execute tests on the Linear Generator, focusing on instrumentation, data acquisition and analysis of complex data streams. You will gain exposure to the entire system, including mechanical and electrical components, software, and controls. The breadth of this role is perfect for an engineer or researcher who wants to use their advanced experimental and analytical skills in a fast-paced product development environment. We are looking for an ambitious and curious individual excited to work at the interface of mechanical engineering, systems engineering, signal processing, data science, and software.
<h3 class="jobSectionHeader">
Responsibilities</h3><ul>
<li>Perform hands on work and operate our Linear Generator test units</li>
<li>Collaborate with engineering teams to steer R&amp;D projects through designing and executing experiments and advanced data analysis, including signal processing techniques</li>
<li>Work closely with design engineers to test individual components and their interaction with the rest of the system, with an emphasis on designing and implementing robust data acquisition strategies for lab instrumentation</li>
<li>Formulate, lead, and facilitate complex data analysis projects, leveraging your expertise in signal processing to extract meaningful insights from raw sensor data</li>
<li>Work directly with technicians to coordinate repairs and retrofits</li>
<li>Manage test priorities on a daily basis to meet higher level deadlines with a focus on throughput and maintaining high uptime</li>
<li>Provide feedback to improve the performance and reliability of the linear generator, informed by your detailed data and signal analysis</li>
</ul><h3 class="jobSectionHeader">Qualifications</h3><ul>
<li>Degree in Mechanical / Electrical / Chemical Engineering or similar field with 3-5 years of applicable experience</li>
<li>Experience designing and executing tests in an industrial or academic environment, specifically involving complex sensor data and signal analysis</li>
<li>Experience with instrumentation selection, integration and data acquisition systems</li>
<li>Successful communicator, with a &quot;collaborate-first&quot; mindset, who will interface across a range of teams and personalities</li>
<li>Experience with Python and/or Matlab, a basic understanding of data structures, and demonstrated experience with signal processing libraries</li>
<li>Detail-oriented and interested in working on interdisciplinary teams</li>
</ul>
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.
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&rsquo;t meet all posted requirements for a particular role, we&rsquo;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.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.</div>

R&D Test Engineer

<div><h3 class="jobSectionHeader">Company Overview</h3>

Mainspring Energy is revolutionizing power generation with the world&rsquo;s most flexible and adaptable local power generation technology, 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 reaction with near-zero NOx emissions. Backed by top-tier investors including Khosla Ventures, Bill Gates, American Electric Power, Lightrock, and General Catalyst Mainspring designs, manufactures and delivers its products to customers across the U.S. today, and we&rsquo;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&rsquo;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&rsquo;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<div></div><h3 class="jobSectionHeader"> 
Job Overview</h3>

The technology that powers Mainspring&rsquo;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&rsquo;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. 
 
We have a high impact opportunity for a power electronics engineer to shape the future of the Linear Generator&rsquo;s power electronics systems.
<h3 class="jobSectionHeader">
Responsibilities</h3><ul>
<li>Design custom power electronics hardware that enables key functions of our Linear Generator</li>
<li>Bring-up, validate, and qualify your power electronics designs</li>
<li>Troubleshoot complex hardware issues that arise in the test lab, production floor, and fielded units</li>
<li>Collaborate with the new production introduction team and external suppliers to improve designs for manufacturability and testability</li>
<li>Partner with reliability engineers to further drive up electrical hardware reliability</li>
<li>Serve as an expert on the hardware systems that you own</li>
</ul><h3 class="jobSectionHeader">Qualifications</h3><ul>
<li>Bachelor&rsquo;s degree, or higher, in Electrical Engineering</li>
<li>2-5 years of experience developing power electronics technologies</li>
<li>Excellent electronics design fundamentals; ability to take concept level design details, select components, and produce a schematic</li>
<li>Examples of taking ownership of a power electronics design project</li>
<li>Circuit board design experience</li>
<li>Familiar with schematic capture and power converter circuit modeling/simulation tools</li>
<li>Knowledge of power electronics control theory</li>
<li>Proficiency with EE tools (Oscilloscopes, Power Analyzers, Network Analyzers, Signal Generators etc.)</li>
<li>Experience with power semiconductor selection, gate drive, and protection circuit design</li>
<li>Proven ability to work independently on an electronics design project</li>
<li>Clear verbal and written communication skills</li>
<li>A passion for hands-on hardware development</li>
<li>A &ldquo;collaborate-first&rdquo; mindset and have successfully communicated across a range of teams and personalities</li>
</ul><h3 class="jobSectionHeader">Nice-to-haves</h3><ul>
<li>Experience designing high voltage (480VAC or 800VDC range) systems</li>
<li>Experience designing kW-level power electronics</li>
<li>Experience in the full hardware development life cycle, from requirements development to manufacturing support</li>
<li>Experience working at a startup or rapid development environment</li>
<li>Experience with Altium</li>
</ul>
This role is an amazing growth opportunity, where you will work closely with and learn from a small team of top-caliber power electronics engineers. Working together, you will jointly own all the custom power electronics within our system.

This is a hybrid position (onsite + remote) at our Menlo Park HQ. It will require you to be onsite as required to perform testing, troubleshooting, manufacturing support, etc. 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.
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&rsquo;t meet all posted requirements for a particular role, we&rsquo;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.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.</div>

Electrical Engineer, Power Electronics

<div>
 
 Company Overview
 
 
 
 Mainspring Energy is revolutionizing power generation with the world&rsquo;s most flexible and adaptable local power generation technology, 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.&nbsp;
 
 
 
 The Mainspring Linear Generator is fuel flexible, ramps up and down to meet demand, and utilizes a flameless reaction with near-zero NOx emissions. Backed by top-tier investors including Khosla Ventures, Bill Gates, American Electric Power, Lightrock, and General Catalyst Mainspring designs, manufactures and delivers its products to customers across the U.S. today, and we&rsquo;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&rsquo;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&rsquo;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
 
 
 
 
 
 Director of Mechanical Engineering
 
 
 We are seeking a Director of Mechanical Engineering to lead a substantial portion of the team scaling the Linear Generator &amp;mdash; a first-of-kind distributed power platform that converts a low-temperature, flameless reaction directly into electricity using high-frequency linear motion instead of rotating machinery. The system integrates reciprocating pressure-driven assemblies, air-spring return chambers, precision alignment systems, and linear electromagnetic machines within a modular 250 kW-class packaged unit. It operates under cyclic loads, tight sealing constraints, thermal gradients, structural dynamics, and grid-interactive performance requirements typical of commercial power generation equipment.
 
 
 
 Reporting to the VP of Mechanical Engineering, this role is being created to expand leadership capacity, elevate risk visibility, and enable disciplined scaling of a growing hardware portfolio.
 
 
 
 You will own ~40-50% of the mechanical organization&rsquo;s active projects and lead ~25 direct and indirect reports, with scope expected to grow. Your teams will oversee multiple core subsystems that are tightly coupled and reliability-critical.
 
 
 
 Success requires both deep mechanical intuition and strong organizational leadership. You will strengthen technical rigor, improve prioritization across 50+ active efforts, and build execution systems that allow the organization to scale without sacrificing engineering excellence.
 
 
 
 
 
 
 Core Responsibilities
 
 <ul>
 
 <li>
 Leadership of ~25 engineers (direct and indirect), including managers
 </li>
 
 <li>
 40-50% of the mechanical project portfolio
 </li>
 
 <li>
 Accountability for multiple core subsystems
 </li>
 
 <li>
 Early identification and mitigation of subsystem and program-level risks
 </li>
 
 <li>
 Strong engineering review discipline (FMEA, DVP&amp;R, tolerance analysis, ECO governance)
 </li>
 
 <li>
 Partnership with Manufacturing and Supplier Quality to support at-scale production
 </li>
 
 <li>
 Development of future engineering leaders
 </li>
 
 </ul>
 
 
 
 
 Qualifications
 
 <ul>
 
 <li>
 18+ years delivering complex industrial or energy hardware
 </li>
 
 <li>
 Experience in high-volume, at-scale environments
 </li>
 
 <li>
 Leadership of 15-30+ engineers (direct + indirect)
 </li>
 
 <li>
 Strong judgment around technical and program risk
 </li>
 
 <li>
 Ability to balance architecture evolution with production realities
 </li>
 
 <li>
 Management experience required; Director title not mandatory
 </li>
 
 <li>
 Senior-level design credibility to lead experienced engineers
 </li>
 
 </ul>
 
 
 
 
 
 
 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&rsquo;t meet all posted requirements for a particular role, we&rsquo;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.
 
 
 
 We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
 
 
 
 
 
 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.
 
 
</div>

Director of Mechanical Engineering

Join Mainspring Energy and explore 4   exciting career opportunities. They're hiring for various roles with options for remote or on-site work. Apply today and become part of their innovative team.

Mainspring Energy

About Company

Test Engineer, Product Qualification

R&D Test Engineer

Electrical Engineer, Power Electronics

Director of Mechanical Engineering