OT Network Engineer

OT Network Engineer

Posted 1 day ago by Harnham

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£550 Per day
Outside
Hybrid
Preston, England, United Kingdom
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Automation BACnet Industrial Internet Of Things (IIoT) Modbus Network Performance Operational Technology (OT) Security PROFINET Standards SQL (Programming Language) Supervisory Control And Data Acquisition (SCADA) TCP/IP Transmission Control Protocol (TCP)

Summary: The OT Network Engineer role involves designing and maintaining a secure OT infrastructure in a manufacturing environment, ensuring reliable communication for various automation systems. The position requires collaboration with both OT and IT teams to optimize network performance and security. The contract is for 6 months, with a focus on practical networking experience and knowledge of industrial control systems. The role is based in the Preston area, requiring some on-site presence initially.

Key Responsibilities:

  • Design and support OT networks (L2/L3, VLANs, QoS, segmentation).
  • Implement OT security controls (zones/conduits, ACLs, firewalls, secure remote access).
  • Optimise latency/jitter impacting PLC scan cycles and motion control.
  • Integrate and troubleshoot Siemens, Allen-Bradley, Schneider PLC/SCADA systems.
  • Support SCADA/HMI (WinCC Unified, FactoryTalk, EcoStruxure).
  • Deep knowledge of Profinet, EtherNet/IP, Modbus TCP, OPC UA/DA, BACnet.
  • Work with IT to align OT designs, manage data flows to ERP/MES/SCADA.
  • Own monitoring, documentation, backups, DR and change control.

Key Skills:

  • Strong understanding of industrial control principles and SCADA behaviour.
  • Practical OT networking experience (segmentation, filtering, deterministic comms).
  • Hands-on with key vendor ecosystems (Siemens / AB / Schneider).
  • Able to diagnose complex system-network interactions.
  • Confident working across both OT and IT teams.
  • Desirable: Robotics, AMRs, conveyors, BMS/HVAC, OT-ERP integrations.
  • IEC 62443 knowledge.
  • Experience with historians, SQL logging, IIoT gateways.

Salary (Rate): £550.00/daily

City: Preston

Country: United Kingdom

Working Arrangements: hybrid

IR35 Status: outside IR35

Seniority Level: undetermined

Industry: IT

Detailed Description From Employer:

Job Title: OT Network Engineer

Location: Preston area (2-3 days on site to start)

Contract: 6 months | Rate: £450-£550 p/d | IR35: Outside TBC

Overview: Seeking an OT Network Engineer to design and maintain a secure, high-performance OT infrastructure across a manufacturing environment. You'll ensure reliable comms for PLCs, HMIs, SCADA, robots, AMRs, BMS/HVAC and ERP-driven automation across multi-VLAN networks, working closely with both OT and IT teams.

Key Responsibilities:

  • Design and support OT networks (L2/L3, VLANs, QoS, segmentation).
  • Implement OT security controls (zones/conduits, ACLs, firewalls, secure remote access).
  • Optimise latency/jitter impacting PLC scan cycles and motion control.
  • Integrate and troubleshoot Siemens, Allen-Bradley, Schneider PLC/SCADA systems.
  • Support SCADA/HMI (WinCC Unified, FactoryTalk, EcoStruxure).
  • Deep knowledge of Profinet, EtherNet/IP, Modbus TCP, OPC UA/DA, BACnet.
  • Work with IT to align OT designs, manage data flows to ERP/MES/SCADA.
  • Own monitoring, documentation, backups, DR and change control.

Required Experience: Strong understanding of industrial control principles and SCADA behaviour. Practical OT networking experience (segmentation, filtering, deterministic comms). Hands-on with key vendor ecosystems (Siemens / AB / Schneider). Able to diagnose complex system-network interactions. Confident working across both OT and IT teams.

Desirable: Robotics, AMRs, conveyors, BMS/HVAC, OT-ERP integrations. IEC 62443 knowledge. Experience with historians, SQL logging, IIoT gateways.

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