L3 Network Engineer
Experience: 7–10 Years
Employment Type: Full time
Location: Chennai

About the Role
We are looking for an experienced L3 Network Engineer to join our Network Operations team. The role involves handling complex network incidents, advanced troubleshooting, network changes, technical escalations, and infrastructure projects across enterprise customer environments.
The ideal candidate should have strong hands-on experience in Cisco networking, routing & switching, firewalls, VPN, SD-WAN, wireless, network security and advanced troubleshooting.

Key Responsibilities
· Provide L3 technical support for complex network incidents escalated from L1 and L2 teams.
· Troubleshoot and resolve complex LAN, WAN, WLAN, VPN and Internet connectivity issues.
· Perform advanced troubleshooting across enterprise network infrastructure.
· Configure, troubleshoot and optimize Cisco routers and switches.
· Troubleshoot routing protocols including BGP, OSPF, EIGRP and static routing.
· Troubleshoot switching technologies including VLANs, trunking, STP/RSTP/MST, EtherChannel and LACP.




· Troubleshoot HSRP, VRRP and network redundancy/high-availability configurations.
· Troubleshoot routing loops, asymmetric routing, packet loss, latency and network instability.
· Analyze network traffic and perform packet-level troubleshooting using Wireshark and packet captures.
· Troubleshoot MPLS, SD-WAN, Internet circuits and WAN connectivity.
· Configure and troubleshoot IPsec, SSL VPN, GRE and site-to-site VPNs.
· Troubleshoot enterprise firewalls including Fortinet, Palo Alto and Cisco ASA/Firepower.
· Troubleshoot firewall policies, NAT, security rules, VPN tunnels and connectivity issues.
· Support enterprise wireless infrastructure including Cisco, Aruba and Meraki environments.
· Troubleshoot wireless authentication, roaming, RF, coverage, performance and connectivity issues.
· Monitor network health and performance using PRTG, SolarWinds or equivalent monitoring platforms.
· An

📌 Network Engineer (Chennai)
🏢 TECEZE
📍 Chennai