Senior Sales Engineer

Mainspring Energy • Menlo Park, CA

38d • Remote

About The Position

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.

Requirements

• 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
• 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%)

Nice To Haves

• Experience in distributed energy, solar, batteries, fuel cells, microgrids, or related technologies preferred

Responsibilities

• 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

Benefits

• This position is remote and eligible for a 25% annual bonus
• Along with the base salary, Mainspring offers pre-IPO stock options + benefits.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level