Network Architect - OT​/SCADA

ON.energyis 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.energydevelops

projects worldwide that set new benchmarks for resilience.

We’re hiring a Senior 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.

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 justification and lead-time input.
• Support spec compute and infrastructure (industrial and rack servers, virtualization sizing, storage, redundant power, UPS) and coordinate with electrical teams on panel layouts, enclosures, grounding, and surge protection.

Design with security in mind

• Build in segmentation, least privilege, hardened baselines, and explicit trust boundaries between IT, OT, client, and vendor networks.
• Contribute to industrial firewall design: zone-to-zone rule sets, OT protocol inspection where required and…