[Remote] Senior Sales Engineer

Note: The job is a remote job and is open to candidates in USA. Mainspring Energy is revolutionizing power generation with innovative technology. The Senior Sales Engineer will serve as a senior technical contributor within the sales cycle, responsible for developing cost-optimized solutions and ensuring architectural integrity throughout the project lifecycle.

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

Skills

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

Company Overview

Mainspring Energy provides power generation technology using linear generators for clean energy. It was founded in 2010, and is headquartered in Menlo Park, California, USA, with a workforce of 201-500 employees. Its website is https://mainspringenergy.com.

Company H1B Sponsorship

Mainspring Energy has a track record of offering H1B sponsorships, with 3 in 2026, 40 in 2025, 23 in 2024, 13 in 2023, 12 in 2022, 6 in 2021. Please note that this does not guarantee sponsorship for this specific role.