Power Systems Site Integration Engineer

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, Next Era Energy Resources, Schneider Electric, and more.

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

• Pragmatic Optimism
• Excellence without Ego
• Proactive Collaboration

Site Integration Engineers report to the Project Engineering Manager within the Project Delivery department. A key enabler of Mainspring’s mission is the ability of its team to deliver solutions based on our linear generator technology that solve customer problems in the cross-section of resiliency and clean power supply.

The project engineering team provides the technical expertise, guidance, and support to deploy linear generators into the field efficiently—building customer confidence and enabling future scalability. This role owns site-level readiness after construction is complete, ensuring that all mechanical, electrical, control, and communication systems are fully integrated, validated, and ready to transition into commissioning and operation. Generator commissioning is performed by a separate team;

this role ensures the site is ready for it. Acting as the technical integration authority on site, this role bridges engineering design intent and real-world system operation.

This role will be responsible for:

• Interpreting technical project details, including scopes of work, sequences of operation, control narratives, and engineering drawings (site plans, P&IDs, single-line, and three-line diagrams), and serving as the controls subject matter expert in design reviews

• Verifying relay settings, meter configurations, and controller programming delivered by third-party integrators against approved settings files and design documents

• Owning site readiness on assigned projects by validating installation quality and accuracy of balance-of-plant systems such as fuel, electrical, metering, protection relays, and communications; developing punch lists and driving issues to closure when discrepancies are found

• Validating electrical and mechanical installations against drawings and specifications by witnessing and/or reviewing results of checks such as wiring and termination verification, grounding, insulation resistance and continuity testing, phase rotation, and electrical acceptance test (NETA) reports; and equipment setting and anchoring, gas piping pressure and leak tests, purging, ventilation and exhaust, and fuel regulator setup

• Configuring equipment and verifying functional readiness of site-level control and communication systems prior to energization, including troubleshooting industrial communication networks (e.g., Modbus TCP/IP, Ether Net/IP, Profibus, OPC-UA)

• Supporting integration with customer PLC/SCADA/HMI platforms (e.g., Ignition, SEL RTAC, Siemens WinCC, AVEVA Wonderware, Rockwell Factory Talk, Schneider Eco Struxure) for system monitoring and control

• Coordinating handoff to the generator commissioning team, confirming all site-level prerequisites are complete before units are started, and keeping project stakeholders updated on readiness status and next steps

• Planning Site Acceptance Testing (SAT) and system-level validation, defining acceptance criteria for customer and utility witness testing, and confirming that as-built operation matches design intent

• Supporting…