Manage and secure multi-site LAN, WAN, wireless, VPN, SD-WAN, firewall, and cloud networking environments. Configure and troubleshoot network infrastructure, administer DNS, DHCP, IPAM, VLANs, and security controls, monitor performance and threats, respond to incidents, and support vulnerability remediation. Participate in network design, site deployments, vendor coordination, documentation, cabling, and data center support. Serve as an escalation point, mentor junior staff, collaborate across IT teams, and provide on-call incident response.