Network Administrator / Network SME (Karnataka)

Job title: Network Administrator / Network SME Location: Pan India, hybrid Experience: 8-10 yrs Job description: - 10+ years of experience in enterprise network administration, wireless infrastructure, network security and datacenter/campus networking support. - Extensive hands-on experience managing Aruba Central for Aruba wireless access points, Aruba switches, device onboarding, monitoring, firmware upgrades, alerting and troubleshooting. - Strong experience with Aruba ClearPass, including Policy Manager, 802.1X authentication, RADIUS, TACACS+, guest access, endpoint profiling, role-based access and NAC policy enforcement. - Good working knowledge of enterprise wireless concepts including SSID design, RF basics, roaming, authentication flows, certificate-based access, captive portal, client troubleshooting and wireless performance optimization. - Strong hands-on experience managing FortiGate firewall policies, address/service objects, NAT, VPN, IPS, web filtering, application control, SSL inspection, SD-WAN, routing integration and HA operations. - Strong understanding of routing and switching technologies including VLANs, trunks, STP/RSTP/MSTP, LACP, OSPF, BGP, static routing, VRRP/HSRP, QoS, multicast basics and network segmentation. - Experience with small and enterprise network tools including IPAM such as Effective IP, or equivalent, with working knowledge of DNS, DHCP, IP allocation, subnet management and IP lifecycle governance. - Ability to monitor and troubleshoot LAN, WAN, wireless, firewall, VPN, internet, branch and datacenter network issues using structured diagnostic methods. - Ability to understand business and technical requirements and translate them into secure, scalable and supportable network solutions using Aruba, Fortinet, routing/switching and IPAM capabilities. - Experience preparing HLD/LLD inputs, network diagrams, SOPs, configuration standards, implementation plans, change plans, migration runbooks, RCA reports and knowledge documents. Key Responsibilities - Administer and support enterprise network services across Aruba Central, Aruba wireless, Aruba switching, Aruba ClearPass, FortiGate firewalls, routing/switching, DNS, DHCP and IPAM platforms. - Manage Aruba Central device onboarding, configuration templates, monitoring, alerting, firmware lifecycle, performance checks and troubleshooting for access points and switches. - Configure, support and troubleshoot Aruba ClearPass authentication policies, enforcement profiles, guest access workflows, endpoint profiling, RADIUS/TACACS+ integrations and NAC use cases. - Support wireless operations including SSID configuration, authentication issues, RF/performance analysis, client connectivity problems and coordination with site teams for access point or switch issues. - Manage FortiGate firewall administration including firewall rules, NAT policies, VPN tunnels, SD-WAN rules, security profiles, address objects, routing, HA checks and policy cleanup activities. - Support routing and switching operations such as VLAN provisioning, port configuration, trunking, routing updates, segmentation changes, QoS checks and network availability troubleshooting. - Operate and maintain IPAM tools such as EfficientIP/Infoblox, including IP allocation, subnet management, DNS/DHCP record updates, utilization review and cleanup of stale assets. - Perform incident, problem and change management activities in alignment with ITSM processes, including impact analysis, risk assessment, implementation and post-change validation. - Monitor network health, capacity, availability and security posture; proactively identify recurring issues and recommend corrective or preventive actions. - Collaborate with security, infrastructure, cloud, application, service desk and customer teams to ensure secure network operations and effective service delivery. - Maintain technical documentation, configuration backups, standard operating procedures, operational handover notes and knowledge transfer materials for BAU teams. .