Job Description

Job Title: Tier-3 (T3) NOC/TAC IP/MPLS & Security Support Engineer

Job Summary

The Tier-3 NOC/TAC IP/MPLS & Security Support Engineer provides advanced technical support for large-scale service provider or enterprise networks. This role focuses on resolving complex incidents escalated from Tier-1 and Tier-2 teams, ensuring network stability, performing in-depth troubleshooting, and coordinating with vendors for critical issues. The engineer will support IP/MPLS backbone networks, data center connectivity, firewalls, and CGNAT platforms across Nokia, Cisco, Juniper, Fortinet, and Checkpoint devices.

Key Responsibilities

Incident & Escalation Management

Act as the highest operational escalation point for complex network and security incidents.
Perform real-time troubleshooting on IP/MPLS backbone, core routers, and security appliances.
Lead Major Incident (P1/P2) bridges and restore service in minimal time.
Work closely with Tier-1/2 NOC teams, providing guidance and technical support.

Troubleshooting & Analysis

Diagnose advanced issues involving:
MPLS, MPLS-TE,



RSVP-TE
L3VPN, L2VPN (VPLS, VPWS, EVPN)
Routing protocols: BGP, OSPF, IS-IS
Analyze packet captures, logs, and control-plane behavior.
Troubleshoot performance, latency, flaps, routing loops, and service outages.
Firewall & CGNAT Support

Resolve escalations for:
Juniper SRX, Fortinet, Checkpoint firewalls
Nokia and Cisco CGNAT platforms
Troubleshoot NAT, filtering policies, VPN issues, and security rule conflicts.
Support customer-impacting security incidents.
Network Stability & Optimization

Perform proactive audits and health checks on backbone infrastructure.
Optimize routing policies, MPLS tunnels, and traffic engineering parameters.
Recommend long-term fixes and preventive measures.

Vendor Coordination

Collaborate with GTAC (Nokia), JTAC (Juniper), Cisco TAC, Fortinet, and Checkpoint support for unresolved issues.
Track vendor cases, implement interim workarounds, and validate

📌 Senior Specialist (Noida)
🏢 Infinite Computer Solutions
📍 Noida