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Senior Network Security Engineer - OT

Elanco | Hook, United Kingdom | Posted June 04, 2026

Position Overview

Responsibilities:

  • Partner with InfoSec and Network Architecture to define and evolve enterprise firewall, NAC, and segmentation architecture across corporate and manufacturing environments.

  • Lead design, implementation, and lifecycle management of Palo Alto firewall policies, zone-based segmentation, and security services, including secure north-south and east-west controls.

  • Design and enforce segmentation strategies aligned to Purdue Model principles in manufacturing networks, balancing cybersecurity, availability, safety, and regulatory requirements.

  • Apply security controls with awareness of industrial protocols such as Modbus/TCP, EtherNet/IP (CIP), PROFINET, OPC/OPC-UA, DNP3, and BACnet, accounting for legacy systems and deterministic traffic flows.

  • Own medium- to high-complexity firewall and NAC initiatives from design through operational handover, including structured documentation and runbooks....

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