Network Engineer

Investigo; Birmingham; On-site; GBP 55,000 - 75,000; Full time

Job summary

Investigo is seeking a Network Engineer to support Manufacturing/Factory OT networks across multiple sites in the UK. The role is based in Birmingham with 2 days on-site per week and requires strong collaboration with cyber security, project teams and vendors.

You'll help deliver secure, resilient OT network services, manage Cisco/Catalyst infrastructure, Fortinet firewalls, Cisco ISE/TrustSec, and contribute to network transformation and security initiatives.

Qualifications

• Minimum 5 years in enterprise or OT network environments.
• Strong understanding of TCP/IP, LAN/WAN, VLANs, routing, and troubleshooting.
• Experience with Fortinet, Cisco ISE/TrustSec and Cisco Meraki.
• Ability to coordinate with vendors and internal teams on security initiatives.

Responsibilities

• Develop and deliver OT network strategy, standards and architecture.
• Maintain factory and core network infrastructure across sites.
• Manage Cisco/Catalyst, VLANs, trunking, L2/L3 networking.
• Administer Fortinet firewall environments and security controls.
• Support Meraki wireless infrastructure and Cisco ISE/TrustSec.
• Oversee Cisco Cyber Vision initiatives for asset visibility and vulnerability management.
• Monitor performance and ensure SLAs are met.
• Coordinate with suppliers and service providers to maintain continuity.
• Deliver network changes, upgrades, and lifecycle activities with minimal disruption.
• Ensure changes are documented and tested through change processes.

Skills

OT network experience

TCP/IP networking

Troubleshooting

Documentation skills

Change management

Stakeholder communication

Tools

Fortinet firewalls

Cisco ISE

Cisco TrustSec

Cisco Meraki

Cisco Catalyst switches

Cyber Vision

Job description

Network Engineer - Manufacturing/ Factory sector

Birmingham, 2 days/ week on-site.

This is a fantastic opportunity for a network specialist with experience in industrial, manufacturing, operational technology, or mission-critical environments to play a key role in maintaining and developing secure, resilient, and highly available OT network services.

Working closely with operational teams, cyber security specialists, project teams, and third-party vendors, you'll be responsible for the delivery and continuous improvement of OT network infrastructure across multiple sites. You'll help ensure critical operational systems remain secure and available while contributing to strategic network transformation and security initiatives.

Key Responsibilities:

• Support the development and delivery of the OT network strategy, standards and architecture.
• Maintain and support factory, customer, and core network infrastructure.
• Manage and troubleshoot Cisco networking environments including Catalyst switching, VLANs, trunking, Layer 2 and Layer 3 networking.
• Administer and maintain Fortinet firewall environments, including policy management, rule configuration, and security controls.
• Support Cisco Meraki wireless infrastructure and wider wireless networking technologies.
• Manage and maintain Cisco ISE and Cisco TrustSec solutions, including identity-based access controls and network segmentation.
• Support Cisco Cyber Vision initiatives, improving OT asset visibility, monitoring, and vulnerability management.
• Monitor network performance and availability, ensuring services meet business SLAs.
• Coordinate with technology suppliers, service providers, and equipment vendors to resolve incidents and maintain service continuity.
• Deliver network changes, upgrades, refreshes, and lifecycle management activities with minimal operational disruption.
• Ensure all network changes are assessed, documented, tested, approved, and implemented through controlled change processes.
• Identify opportunities for continuous improvement across OT networking, resilience, and security capabilities.

Key Skills required:

• Minimum 5 years' experience supporting enterprise, industrial, or operational technology network environments.
• Excellent understanding of TCP/IP networking, LAN, WAN, WLAN, routing protocols, and network troubleshooting.
• Experience supporting Fortinet firewalls, network segmentation, and secure remote access.
• Proven experience with Cisco ISE and Cisco TrustSec, including identity-based access control and Security Group Tags (SGTs).
• Good understanding of wireless networking technologies and Cisco Meraki solutions.
• Experience working with managed service providers, equipment vendors, and third-party technology partners.
• Ability to troubleshoot and resolve complex technical issues within business-critical environments.
• Strong documentation, organisational, and change management skills.
• Excellent communication skills with the ability to engage technical, operational, and business stakeholders.