Controls Engineer

ON.energy is setting the standard for large load interconnection. ON’s patented AI UPS™ is a medium-voltage UPS that serves as a firewall, protecting the data center from the grid, and the grid from the data center. With multiple gigawatts currently under construction, we are enabling grid-safe data centers. 

We're looking for a Senior Controls Engineer to help design, document and improve the control hardware inside the AI UPS. You'll own control panel design, I/O and controller architecture, and the documentation and validation that take a product design from the drawing board through factory testing and site commissioning. You'll work closely with power electronics, electrical, battery systems, software and project teams, and you'll be a technical voice on how our controls platform evolves.

Key Responsibilities

• Design and develop control system hardware for the AI UPS product line, including control panels, I/O architecture, controller and HMI selection, power distribution, and interfaces to power conversion and battery systems.
• Produce and maintain controls documentation: schematics, panel layouts, wiring diagrams, I/O lists, bills of materials, control narratives and as-built drawings.
• Define control architecture between the product's subsystems (inverters/converters, BMS, protection relays, switchgear, auxiliary systems) and to site-level SCADA/EMS.
• Integrate and validate industrial communication protocols (Modbus TCP/RTU, DNP3, OPC-UA, IEC 61850) between product components and customer systems.
• Specify control-network requirements and work with IT and network teams so the product's OT network is segmented, secure and reliable.
• Select and qualify vendors for controllers, panels and key controls components, and work with panel builders on manufacturability and quality.
• Lead or support FAT, SAT and site commissioning; troubleshoot issues and feed lessons learned back into product design.
• Compile technical packages for project engineering and support business development with controls architecture and technical proposals.
• Participate in product design sprints and design reviews, and drive improvements across design, commissioning and O&M.
• Support compliance with applicable standards (UL 508A, NFPA 70/NEC, IEC 61131, IEEE 1547, and cybersecurity frameworks such as IEC 62443).

Required Experience

• Bachelor's degree in Electrical, Controls or Electronics Engineering, or a related field.
• 5+ years of hands-on controls engineering experience in product development, OEM or project-based industrial settings.
• Demonstrated experience designing control panels and control hardware, from schematic through build and test.