Senior Controls Engineer - HMI

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. ABOUT THE ROLE At ON.energy, the Senior Controls Engineer for HMI/SCADA owns the visual design, layout, and functional behavior of every operator-facing screen across our energy storage and power infrastructure platforms. This is a screen-first role — the primary deliverable is a SCADA interface that operators trust, understand, and can act on instantly. The ideal candidate brings deep, hands-on experience with Ignition and its Perspective module, a sharp eye for information design in high-stakes environments, and the communication skills to gather requirements from field operators and translate them into polished, production-ready screens. KEY RESPONSIBILITIES Screen Design & Visual Execution Own the end-to-end design of all Ignition Perspective screens — from concept and wireframe through final implementation and deployment. Design clear, accurate, and visually consistent layouts for system overviews, single-line diagrams, real-time dashboards, alarm views, trending panels, and reporting screens. Develop and maintain a unified component library, color system, icon set, and layout grid for all SCADA interfaces across ON.energy projects. Define and enforce visual and interaction standards so that every screen — regardless of project — looks and behaves like ON.energy product. Ensure screens are optimized for the full range of operator environments: control room monitors, field tablets, and mobile displays. Functionality & Operator Experience Define the functional behavior of each screen: what data is shown, how it updates, what actions operators can take, and how alarms and alerts are surfaced. Design navigation structures, screen hierarchies, and interaction flows that minimize operator cognitive load during normal and abnormal conditions. Conduct usability reviews and structured feedback sessions to identify friction, confusion, or gaps in operator workflows. Continuously improve screens based on operator behavior, alarm frequency data, support tickets, and field observations. Ensure all screens adhere to human factors best practices and relevant standards for control room design. Internal & External Customer Communication Serve as the primary point of contact for all HMI/SCADA screen requirements — gathering inputs from field operators, site managers, project managers, and client stakeholders. Lead structured requirement-gathering sessions, screen walkthroughs, and design reviews with both internal teams and external clients. Communicate clearly with controls engineers and developers to ensure screens are built accurately to specification. Present screen designs, prototypes, and release updates to internal and external clients — collecting feedback and managing change requests. Produce clear documentation for each screen: layout specs, tag mappings, interaction descriptions, and acceptance criteria. Train operators and client teams on new screen features and interface changes during commissioning and project handover. Roadmap & Prioritization Maintain and prioritize a backlog of screen improvements, new views, and component enhancements across all active and upcoming projects. Balance project-specific client requirements against the development of reusable, scalable screen templates that benefit the entire ON.energy platform. Work with project managers to align screen deliverables with project schedules and commissioning milestone…