IT Infrastructure & Network Administrator Full Time NEW

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