Overview: Our client, a fast-growing IT solutions provider, is seeking an experienced Third Line Engineer to support complex infrastructure environments and deliver high-quality IT services to a diverse client base. Key Responsibilities: Design, implement, and maintain enterprise network infrastructure across LAN/WAN environments. Lead core and edge network upgrades, including: OSPF and BGP routing VLAN segmentation and Layer 2/3 switching Multi-Link Aggregation on Mikrotik, Cisco, and Juniper devices Configure and manage firewalls, VPNs, and secure remote access. Monitor and optimize network performance, availability, and security. Troubleshoot and resolve complex routing, switching, and connectivity issues (Tier 3). Assist with secure network integration for Microsoft 365 services (DNS, SPF, mail flow). Collaborate with project teams to deliver tailored, high-performance network solutions. Skills & Experience: Expert-level experience with OSPF, BGP, and enterprise routing/switching. Strong knowledge of firewall configuration and network security policies (Mikrotik, Cisco, Juniper). Hands-on experience with VLAN design, link aggregation, and redundancy protocols. Proficiency in supporting hybrid network environments (on-prem/cloud). Solid understanding of DNS, email routing, and Microsoft 365 networking requirements. Strong problem-solving and diagnostic skills in multi-vendor environments. Effective communicator, able to translate technical issues for non-technical stakeholders. Benefits: Competitive salary Free parking Company events Pension Holiday Allowance upto 25 days bank holidays Opportunities to work on impactful IT projects with a skilled and supportive team If you're interested in finding out more, please apply today for more information!