IT Infrastructure & Network Administrator

Job Summary Experienced IT Infrastructure & Network Administrator with strong expertise in enterprise network operations, firewall security, and multi-vendor environments. Hands-on experience with Extreme Networks, HPE Aruba switching, Fortinet firewall, and Quantum & Aruba wireless infrastructure ensuring high availability. Network & Infrastructure Management - Manage enterprise LAN/WAN infrastructure - Configure Core, Distribution, and Access switches - Implement VLANs, Inter-VLAN routing, STP, RSTP, MSTP, LACP, Port Security - Ensure high availability and redundancy - Implement HSRP / VRRP - Troubleshoot L2/L3 issues - DHCP snooping and loop protection - Switch firmware upgrade and backup Switching (Extreme / HPE Aruba) - Configure Extreme Networks switches (EXOS / VOSS) - Configure HPE Aruba switches - VLAN and trunk configuration - STP, RSTP, MSTP tuning - LACP / Port channel configuration - Inter-VLAN routing - Firmware upgrades and maintenance Firewall & Network Security (Fortinet) - Configure FortiGate firewall - NAT (Static, Dynamic, PAT) configuration - IPSec Site-to-Site VPN and SSL Remote Access VPN - Security policy implementation - Dual ISP failover and SD-WAN - Log analysis and troubleshooting - Security rule optimization Wireless Infrastructure (Quantum & Aruba) - Configure Quantum Wireless AP - Configure Aruba AP and Controller - SSID and VLAN mapping - Guest WiFi configuration - Wireless security WPA2/WPA3 - RF optimization and roaming - Wireless troubleshooting - AP provisioning and troubleshooting Project Handling & Implementation - Lead network implementation and upgrade projects - Firewall migration and policy redesign - L2 to L3 migration and VLAN redesign - New branch connectivity deployment - Core switch replacement and migration - Wireless deployment and controller integration - Dual ISP implementation and failover testing - Network segmentation and security hardening - Coordinate with vendors, ISPs, and stakeholders - Prepare HLD / LLD and network documentation - Post implementation monitoring and support Monitoring & Operations - Extreme Management Center - HP NNM monitoring - SNMP and Syslog monitoring - L2/L3 escalation support - Incident management - Observium monitoring Technical Skills - TCP/IP, OSI Model - VLAN, STP, RSTP, MSTP, LACP, EtherChannel - OSPF, BGP, EIGRP - Fortinet Firewall - Extreme Networks and HPE Aruba Switching - Quantum and Wireless Aruba Wireless Controller Certifications (Preferred) - Extreme Certification - Fortinet NSE4 - Aruba Certification - CCNA / CCNP Physical Layer Knowledge - Structured cabling (Cat6, Cat6A, Cat7, Single-mode & Multi-mode fiber) installation and troubleshooting - SFP/SFP+/QSFP transceiver handling, compatibility and link validation - Fiber patching (LC/SC), Tx/Rx power level verification and optical loss checks - Patch panel termination, rack dressing, and MDF/IDF connectivity management - 1G/10G/25G uplink provisioning over copper and fiber media - Physical link troubleshooting using cable tester / Fluke and interface error analysis