Overview
About Mainspring
Full job description
About Mainspring 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
Job Overview 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. 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.
Develop system architecture, preliminary designs, and cost estimates from concept through execution handoff
Articulate and support sound technical approaches, ensuring appropriate design integration and tradeoff evaluation
Produce complete, accurate, and timely proposal packages across multiple concurrent projects
Build well-supported cost estimates, proactively communicate risks, and incorporate market inputs into pricing assumptions
Support customer meetings, site walks, and solution presentations as the technical subject matter expert
Communicate technical concepts in clear, structured, and solution-oriented formats across customer and internal stakeholders
Collaborate with Engineering, Product, Controls, Commissioning, and Project Management to support technical feasibility and execution alignment
Contribute to peer design reviews to share technical perspective and strengthen overall solution quality
Bachelor’s degree in Electrical/ Mechanical/ Systems/ Energy Engineering
7+ years of experience in sales engineering, applications engineering, front-end engineering development (FEED) or cost estimating within electrical power systems or related industries
Experience in distributed energy, solar, batteries, fuel cells, microgrids, or related technologies preferred
Familiarity with electrical power systems, three phase inverters, protection relays, and the physics of grid integration
Strong understanding of standard electrical drawings such as wiring diagrams, electrical schematics, and one-lines
Ownership Mentality: Proactive in identifying risks and comfortable advocating for the resources needed to solve them
Ability to travel nationally (~25%)
Tips for this job
Practical Job and Scholarship guidance. These tips do not replace official rules or create new eligibility requirements.
- Tailor the CV and application to the responsibilities and required skills stated on the official employer page.
- Use concrete evidence of relevant work, projects and measurable results rather than generic claims.
- Confirm location, work authorization, remote restrictions and sponsorship terms before applying.
- Apply through the original employer or official recruitment destination shown on this page.
Verification notes
laptop-ats-crawler v2
Job and Scholarship is the discovery and verification layer. Confirm eligibility, dates, salary/funding and application instructions on the original source before submitting anything.
mainspringenergy (lever) ↗Browse current Job and Scholarship listings from mainspringenergy (lever) →
