Senior Specialist

Infinite Computer Solutions India Pvt. Ltd.

Fresher

Posted 7 hours ago
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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 permanent fixes.

Change Management

Review and validate change requests (CRs) and methods of procedure (MOPs).
Support scheduled maintenance on backbone routers, firewalls, or MPLS services.
Participate in planned upgrades, migrations, and feature enablements.

Documentation & Knowledge Sharing

Create technical documents, RCA reports, and troubleshooting guides.
Train and mentor Tier-1 and Tier-2 NOC engineers.
Maintain accurate system diagrams and configuration archives.

Required Skills & Experience
Networking & MPLS Expertise

Strong hands-on experience with:
- MPLS, MPLS-TE, RSVP-TE
- MPLS L3VPN / L2VPN / VPLS / EVPN
Solid understanding of BGP, OSPF, IS-IS, route policies, and traffic engineering.
Experience with QoS, multicast, redundancy protocols (VRRP/HSRP), and LAG/LACP.

Multi-Vendor Platform Knowledge

Nokia 7750 SR / SR-OS
Cisco NCS540, ASR9000 (IOS-XR)
Juniper MX, QFX, SRX
Fortinet FortiGate, Checkpoint firewalls
CGNAT platforms across Nokia, Juniper, and Cisco

Security Knowledge

Firewall rule management, NAT, IPS/IDS
VPN troubleshooting (IPSec, IKE, SSL)
CGNAT/LSN behavior, logging, and capacity issues

Operational Skill Set

Strong incident management capability
Familiarity with monitoring tools (NetFlow, SNMP, Telemetry)
Log analysis, packet capture tools (tcpdump, Wireshark)
Experience with ITIL-driven processes (Incident, Change, Problem)
Good documentation and communication skills

Education & Certifications (Preferred)

Bachelor's in Engineering, Computer Science, or related field
Certifications preferred:
- CCNP/CCIE
- JNCIP/JNCIE
- Nokia NRS-II or SRA
- Fortinet NSE4/7
- Checkpoint CCSA/CCSE