Network Engineer

IT/OT Onsite Network Engineer - Contract

Location: Prestwick, UK (Onsite)

️ Contract: 6 Months (Extension Possible)

Rate: £375 per day (Inside IR35)

On-Call: Required for high-priority incident support

About the Role

Our client, a top global organization, is seeking an experienced IT/OT Onsite Network Engineer to support secure network and operational technology environments across industrial sites. You will play a critical role in deploying, managing, and securing IT/OT infrastructure, ensuring compliance, resilience, and operational continuity. This position is suited for a technically hands-on network professional with deep understanding of firewalls, VLAN segmentation, industrial protocols, and IT/OT convergence in manufacturing or production environments.

What You'll Do

• Support the Digital Technology Leader in implementing IT/OT security and connectivity projects.
• Coordinate with maintenance, EHS, operations, and quality teams to ensure secure shop-floor connectivity.
• Conduct OT/IT asset discovery, maintain inventory and documentation, and ensure compliance with control standards.
• Configure and deploy network infrastructure including switches, firewalls, SD-WAN, and routers (Cisco preferred).
• Manage patching, malware scanning, and vulnerability remediation for OT assets.
• Implement and monitor removable media control policies and vendor compliance.
• Deploy and manage Nozomi network taps and network segmentation solutions.
• Build and maintain recovery, backup, and remote access solutions for critical OT systems.
• Manage hardware procurement, vendor coordination, and audit preparation activities.
• Provide on-call support for critical incident response.

Essential Skills & Experience:

• Strong experience with firewall rule configuration, VLAN micro-segmentation, and switch/router setup.
• Proficiency in network security configuration and management of network taps.
• Experience with secure industrial protocols (OPC-UA, Modbus TCP/IP, Ethernet/IP, SMB).
• Network design and implementation for LAN/WAN, VLANs, and routing protocols.
• Hands-on expertise with Cisco firewalls, SD-WAN, and switches.
• Experience deploying and managing OT business tools (remote access, file transfer, monitoring, backups).
• CCNA/CCNP or CompTIA Network+ certification required.
• OT security or cloud certifications (e.g., SANS ICS, AWS, Azure) are advantageous.

Desirable:

• 10+ years of experience across IT/OT environments.
• Exposure to industrial assets such as PLCs, HMIs, CNCs, sensors, and inspection systems.
• Experience integrating IT networks with OT systems.
• Familiarity with AWS Storage Gateway, IoT, and Historian applications.

Why Join

• Opportunity to work directly with a global industrial transformation programme.
• Exposure to cutting-edge IT/OT integration and cybersecurity initiatives.
• A technically challenging role combining network engineering, security, and operational resilience.

If this is relevant, please apply with your CV and we will be in touch.