Senior Electrical Engineer, Data Centers

ON.energy is building the backbone of energy and AI infrastructure powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resilience challenges, delivering custom solutions for AI data centers, mission-critical facilities, and front-of-the-meter assets. ON recently announced a 5GW partnership, with 3GW currently under construction across multiple hyperscale data center campuses. With patented technology and proprietary software, ON.energy develops projects worldwide that set new benchmarks for resilience. The Hyperscale Datacenter Senior Electrical Engineer is the senior electrical authority for ON.energy's presence at hyperscale, colocation, enterprise, and AI-focused data centers. This role is focused on data center electrical engineering, while maintaining utility-interface fluency to translate customer, operator, substation, and site-infrastructure requirements into deployable product requirements, interfaces, and reference electrical designs. Key Responsibilities Reference Architectures & System Definition Inform the end-to-end electrical reference architectures for ON.energy products across hyperscale, colocation, enterprise, and AI factory topologies LV and MV distribution, data center substation interfaces, and next-generation 800 Vdc designs. Define single-line diagrams, redundancy models, substation interface assumptions, and fault-tolerance strategies for UPS, BESS, PCS, microgrid, and EMS integration. Establish and enforce Interface Control Documents (ICDs) between ON.energy equipment and upstream utility, downstream IT load, and site controls. Requirements Engineering Own the requirements traceability matrix from customer SOW to system architecture to subsystem to component test. Define compliance boundaries against applicable standards such as TIA-942, ASHRAE TC 9.9, and IEC 62040. Customer & Ecosystem Engagement Act as the technical face to hyperscale, colocation, and AI infrastructure customers throughout new product development. Lead architecture reviews with project engineering teams, data center operators, and chip / server OEMs. Represent ON.energy in industry working groups and codify insights into technology roadmap s . Product & Technology Roadmap Inform the architectural roadmap for ON.energy product architectures. Evaluate emerging DC power distribution, solid-state transformer , and grid-interactive architectures; recommend build / buy / partner strategies. Own vendor evaluation and technology partner scorecards from a systems-fit perspective. Experience & Requirements Education: B.S. in Electrical Engineering, Power Systems Engineering, or related field required. M.S. preferred; PhD acceptable where paired with substantial applied data center electrical design experience. Experience: 5+ years in data center electrical systems, mission-critical facilities, hyperscale infrastructure, or A&E engineering serving hyperscale / colocation customers. Domain Depth: Hyperscale and colocation electrical topologies from utility service entrance, data center substation design, MV/LV distribution, UPS and BESS integration, redundancy strategy, fault isolation, and server rack PDU interface requirements. Preferred Experience Architected power delivery for AI training clusters (>100 kW / rack, liquid-cooled, coincident load dynamics). Prior work as a hyperscaler owner's engineer, colocation infrastructure lead, or MEP principal for mission-critical facilities. Published contributions to OCP, Uptime, IEEE PES, or CIGRE. Professional Engineer (PE) license preferred, especially where paired with hands-on data center, substation, or mission-critical electrical design ownership. U.S. Person status, or ability to support DOE / national-lab collaborations where U.S. Person eligibility is required. For US-based roles - What you’ll get: Competitive salary + annual performance-based bonus eligibility Medical, dental, and vision insur…