IT Network Operations Support Engineer

£750 per day Umbrella Inside IR35

London / Hybrid (2-3 days on-site)

12-Month Contract

Start ASAP

My client is a leading international financial services organisation seeking an experienced IT Network Operations Support Engineer to join their Technology Services team. This role will focus on maintaining and supporting critical enterprise and data centre network infrastructure, ensuring high availability, operational stability, and rapid incident resolution across a complex technology estate. You will support a large-scale infrastructure consolidation programme and work closely with engineering, security, and operations teams to troubleshoot issues, implement network changes, improve performance, and maintain secure network services.Key Requirements

• 8+ years' experience supporting large-scale enterprise and data centre network environments.
• Strong troubleshooting experience across L2-L7 networking, including BGP, OSPF, routing, and switching technologies.
• Hands-on experience with Cisco ACI administration, operations, and fault analysis.
• Strong experience supporting Palo Alto and Fortinet firewall environments.
• Experience with MPLS, SD-WAN, hybrid WAN, ExpressRoute, Direct Connect, and cloud connectivity.
• Knowledge of AWS and Azure networking within hybrid environments.
• Experience leading incident response, root cause analysis, and service restoration activities.
• Strong understanding of network security principles including segmentation and Zero Trust architecture.
• Strong analytical and technical troubleshooting skills within complex production environments.
• Hands-on automation experience using Python, Ansible, APIs, or Infrastructure Automation tooling.

Nice to Have

• Financial Services or other highly regulated industry experience.
• Experience supporting low-latency, high-availability production environments.
• Experience working within Cisco-based enterprise networks.
• Experience supporting network transformation, migration, or modernisation initiatives.

The successful candidate will be comfortable operating in fast-paced production environments, resolving complex network incidents, supporting critical infrastructure services, and driving operational stability throughout a major network and infrastructure transformation programme.

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