Senior Specialist Network Architect - OT/SCADA

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. Role Summary We're hiring a Senior Specialist, OT/SCADA Network Architect to be the in-house design authority on OT networks for our AI data center UPS projects. You'll work side by side with the engineering manager, who sets direction and approves the architecture. Within that, the design work is yours. We build from a standard base network design that serves as the template for every project, adapted per site for size, topology, and interconnection requirements. You'll help refine that template and apply it project by project, so your work compounds across the portfolio instead of being rebuilt each time. Key Responsibilities Architect the OT network Develop the designs, analyze the options, and make the technical recommendations decisions are built on. The manager gives final approval; the design is your craft. Refine the base design template: zoning model, IP and VLAN scheme, redundancy topology, equipment baseline and adapt it per project, flagging when a site genuinely needs to deviate rather than quietly forcing a fit. Produce the design packages: L1/L2/L3 diagrams, IP and VLAN schedules, switching and routing configurations, port maps, and cable/fiber schedules. Design heavily segmented, multi-zone networks: Purdue-aligned levels, DMZs, conduits between zones, along with the redundancy, QoS, and time synchronization (NTP/PTP/IRIG-B) that keep control traffic reliable. Design site-to-site VPN connectivity into our cloud environment, secure remote access for our engineers and vendors, and out-of-band management. Support design reviews and commissioning: network test plans, troubleshooting during energization, and as-builts. Document decisions clearly enough that project engineers and technicians can execute without re-deriving your reasoning. Own the IT/OT boundary Apply a clear model of IT/OT separation: where the boundary sits, what crosses it, and why. Map dataflows end to end, from PCS, BMS, meters, and site SCADA through to our cloud environment and client-facing platforms. Design the DMZ, gateway, and data-transfer patterns that get business systems the data they need without exposing control systems, and coordinate with IT and cloud teams on identity and remote access. Guide vendor and equipment selection Recommend network and infrastructure equipment: industrial switches, routers, firewalls, media converters, gateways, to include weighing environmental ratings, form factor, PoE budgets, protocol support, lifecycle, and spares. Present trade-offs, not a single answer. Review vendor and OEM submittals against our base design, recommend how to close gaps, and support procurement with sizing…