Requirements: 7+ years' experience in enterprise network engineering. Hands-on FortiGate firewall administration and maintenance (not negotiable). Providing experience with Extreme Networks switching environments. Strong expertise in routing and switching & firewall rule management and troubleshooting & network security and segmentation. Fortinet NSE (or equivalent FortiGate certification) preferred Extreme Networks certification preferred CCNP (Enterprise or Security) or equivalent experience preferred Experience in financial services, insurance or other regulated environments advantageous Exposure to Azure networking concepts advantageous Exposure to network monitoring and observability tools advantageous Exposure to disaster recovery network design advantageous Responsibilities: Enterprise Network Engineering Design, implement, and maintain enterprise LAN, WAN, WLAN, and datacentre network infrastructure. Operate and support Extreme Networks switching environments, including: Configuration and maintenance of Extreme switches VLANs, trunking, STP, and redundancy Troubleshooting performance and connectivity issues Perform advanced routing and switching, including: OSPF and BGP High‑availability and failover designs Act as Tier‑3 escalation for complex network incidents. Firewall & Security Strong FortiGate experience is mandatory. The successful candidate will have full operational ownership of the firewall estate:Configuration, management, and ongoing maintenance of FortiGate firewalls. Firewall policy and rule management, including: Rule creation, optimisation, and cleanup NAT and security policies VPN configuration (site‑to‑site and remote access) Monitoring firewall health, logs, and security events. Troubleshooting firewall‑related incidents affecting application and user connectivity. Supporting security audits and compliance requirements aligned to financial‑services governance. Wireless & Edge Networking Design, deploy, and support enterprise WiFi environments, including high‑density office deployments. Secure wireless authentication (WPA2/WPA3, 802.1x). Performance tuning and interference troubleshooting. Operations, Disaster Recovery & Collaboration Support datacentre and disaster recovery network connectivity, ensuring resilience and failover readiness. Participate in planned maintenance windows and after‑hours support where required. Collaborate closely with: Server and virtualization teams Security teams External vendors and service providers Documents & Standards Maintain accurate network and firewall documentation, diagrams, and configuration records. Enforce network and firewall standards and best practices. Mentor junior engineers and contribute to operational maturity within the infrastructure team.