Senior Network Support Lead – L3 (Cisco & Fortinet)

Position Overview

Lead L3 network support, advanced troubleshooting, firewall management, network security, and infrastructure optimization. Own critical incident resolution, support network architecture and migrations, and mentor junior engineers.

Key Responsibilities

• Handle L3 escalations involving OSPF, BGP, VLANs, STP, QoS, NAT, ACLs, and VPNs.

• Lead P1/P2 incidents, root cause analysis, and packet analysis using Wireshark, FortiAnalyzer, and Syslog.

• Manage Fortinet FortiGate firewalls, security policies, NAT, VPNs, UTM profiles, and HA.

• Review HLD/LLD designs for network upgrades, migrations, segmentation, and new sites.

• Optimize network performance, capacity, reliability, and security.

• Develop automation scripts using Python, Bash, and EEM for backups, compliance, and monitoring.

• Lead network changes, firewall migrations, routing redesigns, and upgrades, including RFCs and rollback plans.

• Coordinate with Cisco/Fortinet TAC, ISPs, and cross-functional teams.

• Maintain network documentation, SOPs, runbooks, and configuration standards.

• Mentor L1/L2 engineers and improve operational processes.

Required Qualifications

• 10–12 years of networking experience, including 3–4 years in L3/senior escalation roles.

• Strong hands-on experience with Cisco IOS/XE, NX-OS, OSPF, BGP, VLANs, STP, and EtherChannel.

• Expertise in Fortinet FortiGate/FortiOS and Meraki wireless.

• Experience with SD-WAN, VXLAN, Cisco DNA Center (DNAC), and Cisco ISE.

• Strong knowledge of network security, VPNs, QoS, segmentation, and high availability.

• Experience with NMS/SNMP monitoring, Syslog, and packet capture tools.

• Working knowledge of Python, Bash, and EEM automation.

• CCNA certification or equivalent hands-on experience.

• Strong troubleshooting, incident management, communication, and mentoring skills.

Preferred Qualifications

• CCNP Enterprise certification.

• Fortinet NSE 4 or higher certification.

• Experience with Aruba Wireless, Extreme Networks, or Juniper.

• Knowledge of SIP, VoIP, and voice troubleshooting.

• ITIL v4 Foundation certification (optional).