Senior Mechanical Engineer - Thermal / Fluids Hardware Design

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.

The core values that ground our work, guide our decisions, and connect us together:

• Pragmatic Optimism


• Excellence without Ego


• Proactive Collaboration

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.

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  Participate in brainstorming activities to develop novel ways to improve all aspects of the Linear Generator

  
  


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  Develop and optimize key thermal subsystems of the Linear Generator to drive down cost, improve performance, and deliver high reliability

  
  


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  Contribute to projects within the thermal subsystems and projects in other subsystems

  
  


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  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

  
  


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  Collaborate cross-functionally with manufacturing engineering, NPI, and external suppliers to rapidly deploy new designs into production

  
  

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  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

  
  


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  Direct experience designing air or liquid handling systems, with demonstrated engineering fundamentals in thermo-fluid system design

  
  


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  Fluent in SolidWorks or comparable CAD package.  Experience with using PDM or a similar CAD version control system is preferred

  
  


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  Experience with finite element analysis (structural, thermal, or fluids)

  
  


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  Familiarity with 1D or 3D thermal systems design simulation tools

  
  


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  Experience working with suppliers to develop and qualify new components

  
  


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  Experience with various manufacturing processes such as sheet metal forming, machining, and plastics molding and forming

  
  


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  Demonstrated attention to detail with the ability to generate and review design documentation, bill of materials, work instructions and test plans and reports

  
  


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  Experience utilizing GD&T is ideal

  
  


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  Ability to work independently, manage multiple projects in a fast-paced environment, and demonstrate leadership and mentoring abilities

  
  


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  Experience leading projects through a full design lifecycle from concept through manufacturing support is preferred

  
  


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  Interest in developing creative and cost effective solutions to enable the deployment of zero carbon energy technology at large scale

  
  

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.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. 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.