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# Senior Network Support Lead - L3 (Cisco & Fortinet)

- **Company:** SRI Tech Solutions Inc.
- **Location:** New York, NY, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Bash Shell, Border Gateway Protocol, VoIP, Cisco IOS, Network Address Translation, EtherChannel, Virtual Private Networks (VPN), Internet Service Provider, Python (Programming Language), Network Security, Network Architecture, Packet Analyzer, Open Shortest Path First (OSPF), Overlay Transport Virtualization, Firewall Policy Management, Runbook, Simple Network Management Protocols, Syslog, Wireshark, Virtual Local Area Networks, Wide Area Networks, Identity Services Engine, Nx-os, System Availability, Software Troubleshooting, Juniper, Network Support, Fortinet, Cisco, Network Optimization
- **Published:** October 21, 2026
- **Apply:** https://www.dice.com/job-detail/6f591340-0a79-479e-a158-28e616d5ea2d

## About the Role

* 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., * 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).

## Description

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., * 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.