Job Title

Global IT Organisation is hiring for a 3rd Line Senior Support Network Engineer for their team based in Basingstoke. This role requires 5 days onsite and SC Clearance is required for this role. Salary ranges between 55K - 60K + Bonus + Benefits.As a 3rd Line Senior Network Engineer, you will provide operational support for a large-scale, 24/7 enterprise network spanning multiple data centers and UK-wide offices. Youll play a key role in supporting BAU operations, managing configurations and upgrades, collaborating across internal and external teams, and supporting major project delivery initiatives. Youll also act as a technical mentor to the 2nd line network support team, guiding them in best practices and helping grow their expertise.Responsibilities include:Deliver 3rd line support and incident resolution across enterprise-level networksPerform complex network configuration changes and upgradesSupport the delivery of high-impact network projectsCollaborate with vendors, partners, and internal teams to troubleshoot and resolve issuesProvide technical guidance and mentoring to junior engineersSkills and Experience:CCNP-level networking knowledge (minimum)Deep experience in IP routing (BGP, OSPF, static routes, HSRP, VRF, tunneling protocols)Strong Layer 2 networking skills (VLANs, 802.1X, port-security, STP)Hands-on experience with Cisco firewalls (Firepower, ASA, ASDM, ACLs, IPSEC VPNs)Familiarity with Cisco Catalyst & Nexus switches, ISR/ASR routers, and Cisco ISEWorking knowledge of network encryption solutions including CatapansExperience with Juniper switches and spine/leaf topologiesKnowledge of F5 Load Balancers and Cisco ISE Appliances SC Clearance is required for this role Please apply for immediate interview!