Network Administrator

Roles & Responsibilities

• Plan, design, implement, configure, maintain, and troubleshoot network infrastructure across offices, campuses, and locations.
• Manage and monitor LAN, WAN, Wi-Fi, firewalls, VPNs, captive portals, and network security services.
• Configure and maintain Aruba switches, routers/gateways, access points, and Aruba Central.
• Configure and maintain TP-Link/Omada routers, managed switches, access points, and Omada Controller/OC300.
• Manage and troubleshoot Cisco switches and networking equipment.
• Configure and troubleshoot VLANs, trunking, access ports, STP, LACP, routing, inter-VLAN routing, DHCP, DNS, NAT, and IP addressing.
• Design segmented networks for staff, students, guests, CCTV, servers, and other business requirements.
• Administer Palo Alto and Sophos Firewalls, including security policies, NAT, web filtering, application control, traffic shaping, SD-WAN, and WAN failover.
• Configure and troubleshoot site-to-site IPsec VPNs and secure remote connectivity.
• Configure and manage captive portals for authentication and controlled network access.
• Monitor network performance, bandwidth utilization, latency, packet loss, link quality, and device health.
• Use Aruba Central and TP-Link Omada Controller for centralized monitoring, management, and alerting.
• Troubleshoot LAN, WAN, Wi-Fi, Internet, firewall, VPN, DHCP, DNS, VLAN, routing, switching, and IP addressing issues.
• Manage enterprise Wi-Fi, including SSIDs, VLAN mapping, authentication, roaming, AP connectivity, coverage, and performance.
• Manage and troubleshoot CCTV/IP cameras, NVRs, CCTV switches, and CCTV VLANs.
• Monitor leased lines, broadband, RF links, and backup Internet connections.
• Coordinate with ISPs, vendors, and internal IT teams for outages, latency, packet loss, and connectivity issues.
• Configure and troubleshoot WAN failover and load balancing.
• Monitor firewall logs and network traffic for policy violations, abnormal activity, and security threats.
• Support network security, hardening, and ISO 27001-related requirements.
• Maintain network configuration backups, topology diagrams, IP details, VLAN information, switch-port mappings, firewall/VPN details, and device inventory.
• Create and maintain SOPs and technical documentation for network installation, configuration, troubleshooting, and maintenance.
• Participate in network deployments, upgrades, migrations, and new-site implementation projects.
• Provide network support during critical business events, examinations, live streaming, and high-priority activities.
• Perform root-cause analysis (RCA) and prepare reports for major network incidents.
• Coordinate with internal teams, vendors, and service providers for incident resolution.
• Support planned maintenance and critical network incidents outside regular working hours when required.

Skills Required

• 23 years of hands-on experience in Network Administration, Network Engineering, or Network Infrastructure Support.
• Strong hands-on experience with Aruba Infrastructure and Aruba Central.
• Strong hands-on experience with TP-Link/Omada Infrastructure and Omada Controller/OC300.
• Hands-on experience with Cisco switches, Cisco IOS, VLANs, trunking, STP, routing, and switch-port troubleshooting.
• Hands-on experience with Palo Alto and Sophos Firewalls.
• Strong knowledge of TCP/IP, IPv4, subnetting, CIDR, VLANs, STP, LACP, DHCP, DNS, ARP, ICMP, NAT, routing, and inter-VLAN routing.
• Knowledge of static routing and basic OSPF.
• Experience with firewall policies, NAT, web filtering, application control, QoS/traffic shaping, SD-WAN, WAN failover, and load balancing.
• Experience with site-to-site IPsec VPN configuration and troubleshooting.
• Experience with captive portals and centralized network monitoring.
• Strong enterprise Wi-Fi administration and troubleshooting skills.
• Experience with CCTV/IP cameras, NVRs, and CCTV network infrastructure.
• Strong troubleshooting, problem-solving, and root-cause analysis skills.
• Experience coordinating with ISPs, vendors, and internal IT teams.
• Good understanding of network security, segmentation, and secure network design.
• Ability to maintain network topology diagrams and technical documentation.
• Familiarity with ISO 27001, CIS, and NIST security controls is an adv…