Role: Network and Security Engineer - CISCO / ISEContract Rate: £380 - £420 per day PAYE - Inside IR35 Contract Role: 6 monthsLocation: Didcot - OxfordshireHybrid role 3 days on site / 2 WFH ROLE OVERVIEWOur client are looking for an experienced, fully hands-on Level 3 engineer to strengthen our infrastructure and network security operations capability. This is a senior technical delivery role - not a design-only or advisory position. You will be expected to configure, troubleshoot, and resolve complex issues across Cisco security suite, networking, security appliances, server infrastructure, and hybrid-cloud connectivity with minimal supervision.The environment spans a multi-building campus network, data-centre infrastructure, SD-WAN fabric, cloud gateway controllers, and enterprise security platforms. You will work closely with leaders in IT Operations to maintain service availability and to assist in fast tracking their infrastructure transformation.KEY RESPONSIBILITIESNetwork Engineering and OperationsConfigure, deploy, and troubleshoot campus and data-centre 100Gbps switchingExecute network switch rollouts including hardware racking, cabling to standard, patch-panel termination, and fibre patching.Perform structured cabinet clean-ups: re-patching copper and fibre runs, labelling, cable management, and documentation updates.Support and maintain the eBGP routing fabric across multiple sitesConfigure and monitor QoS profiles for mixed multigigabit, 10G/100G, and uplink inte