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ON.energy is building the power infrastructure that makes the AI era possible. As AI demand surges past what the grid and traditional data centers can support, ON.energy provides a new class of power technology proven at gigawatt scale and trusted by the world’s leading cloud and AI companies. Our systems are already deployed across 2.5 GW of hyper-scale campuses, validated by top U.S. national labs, and certified for grid-safe operation by major utilities. With real products in the field, we’re scaling faster than the grid can, transforming power from a bottleneck into a competitive advantage for the companies building the future. ON.energy is building the power infrastructure that makes the AI era possible. As AI demand surges past what the grid and traditional data centers can support, ON.energy provides a new class of power technology proven at gigawatt scale and trusted by the world’s leading cloud and AI companies. Our systems are already deployed across 2.5 GW of hyper-scale campuses, validated by top U.S. national labs, and certified for grid-safe operation by major utilities. With real products in the field, we’re scaling faster than the grid can, transforming power from a bottleneck into a competitive advantage for the companies building the future. Role Overview The Principal Electrical Engineer (Product/Hardware) is the supreme technical authority for ON.energy’s hardware ecosystem. This role is responsible for the overarching technology roadmap of multi-megawatt Battery Energy Storage Systems (BESS) and high-voltage UPS systems. You will lead the next-generation architecture of 1500VDC topologies and medium-voltage (MV) grid integrations, ensuring perfect, zero-transfer-time uptime for the world’s largest hyperscale AI data centers. Key Responsibilities (What Changes at the Principal Level) Architectural Ownership: Define the standard product topologies for modular, utility-scale power platforms. You choose the underlying electrical framework for how the next generation of power electronics, transformers, and switchgear seamlessly combine. Grid Interconnection & ISO Authority: Serve as the company's leading Subject Matter Expert (SME) on complex ISO/RTO grid codes (such as ERCOT, PJM, and CAISO). You orchestrate how the hardware behaves during transient grid events and voltage ride-through testing. Strategic Vendor & OEM Selection: Establish strategic technical partnerships with Tier-1 battery (e.g., CATL, Sungrow) and Power Conversion System (PCS) OEMs. You define the custom procurement specifications that OEMs must meet to fit ON.energy's product stack. Ultimate Escalation Point: Act as the highest engineering escalation point for critical root-cause analysis (RCA) regarding power electronics failures, thermal anomalies, or major system interactions in the field. Regulatory & Compliance Strategy: Partner with compliance divisions to dictate the testing, listing, and certification roadmaps (such as UL 9540, UL 1741, and NFPA 855) for all new product introductions (NPI). Technical Mentorship: Drive engineering excellence across the organization, mentoring senior electrical, controls, and project engineers to scale the technical capability of the team. Required Qualifications & Technical Skills Education: Master’s or Ph.D. in Electrical Engineering with a heavy specialization in Power Electronics or Utility Power Systems. A active Professional Engineer (PE) License is highly preferred. Experience: 10 to 15+ years of definitive engineering leadership in utility-scale energy storage, high-voltage data center substations, or large-scale industrial grid tie-ins. Deep Hardware & Controls Synthesis: Extensive experience modeling battery sizing, degradation lifecycles, and validating how EMS/SCADA plant controllers communicate (via Modbus/DNP3) with localized hardware components. Advanced Simulation Mastery: Mastery of