Principal Electrical Engineer - Power Plant Integration Lead

Job Overview

As we scale our deployments from Behind-The-Meter (BTM) commercial microgrids to utility-scale Front-of-the-Meter (FTM) power plants and data centers, we are expanding our system boundaries to provide fully integrated, turn-key power solutions.

This role sits at the intersection of power systems engineering, cross-functional hardware integration, and external vendor management. You will own the technical architecture and vision of how Mainspring power plant sites are built, including full ownership of the modular power skids. This includes ownership of the broader site: how generators, inverters, skids, and energy storage come together as a complete and configurable power solution. You will act as the technical anchor, translating high-level single-line diagrams and architectural concepts into robust, mass-manufacturable modular skid-based products. The ideal candidate will bridge the gap between initial concept and factory-ready design by driving requirements across internal multidisciplinary teams (Electrical, Mechanical, Project Delivery, Software Controls, and Supply Chain) while managing critical 3rd-party design and manufacturing partners to scale the product line.

Responsibilities

• Take full engineering ownership of Mainspring's next-generation modular power integration skids, actively translating high-level system architectures into fully commercialized, production-ready assets by driving the design from initial concept through validation and final manufacturing release

• Define and own the skid-level power topology for utility-scale and data center sites, ensuring seamless electrical and physical integration between Linear Generators, central inverters, step-up transformers, switchgear, and energy storage systems (BESS)

• Own detailed skid engineering decisions: hardware selection, spatial layout, thermal management, environmental protection (NEMA/IP rating, seismic/wind loading as applicable), manufacturability, and field serviceability

• Partner actively with internal electrical engineering, mechanical engineering, project delivery, operations, software controls, and supply chain teams to extract, synthesize, and freeze comprehensive system requirements

• Direct and manage third-party design firms and external manufacturers, serving as the primary technical point of contact to ensure engineering and manufacturing outputs align with technical specifications and quality standards

• Drive the scalability and production readiness of larger skid configurations alongside manufacturing suppliers, ensuring the architectural design leverages standardized hardware, reduces site-level installation labor, and is optimized for high-volume replication

• Own the skid's cost target and drive design-to-cost trade-offs across hardware selection, supplier strategy, and configuration options