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ZYBISYS CONSULTING SERVICES LLP

NOC L3 Engineer - Network

ZYBISYS CONSULTING SERVICES LLP · Bengaluru, Karnataka, India

IT Services and IT Consulting · 51-200 employees

May 22
Senior (5-10 yrs) Full-time India
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About the role

The L3 NOC Engineer will lead advanced troubleshooting and root cause analysis for network, firewall, and voice infrastructure. They are responsible for implementing upgrades, managing security policies, and providing technical guidance to L2 engineers.

What they look for

Cisco Networking Firewall Management VoIP Troubleshooting Cisco Nexus BGP OSPF QoS Check Point Firewall SIP CUCM Network Security NAT VPN Voice Traffic Optimization

Requirements

Candidates must have 5-8 years of experience with strong expertise in Cisco routing, switching, and voice technologies. Preferred qualifications include CCNP, CCNA, and Check Point certifications.

Full description

Job Title: NOC Engineer – L3

Location: Bangalore

Department: IT-INFRA

Experience – 5-8 Years

Role Overview:

We are looking for an L3 NOC Engineer – Network & Voice with strong expertise in Cisco networking, firewalls, and VoIP technologies. The role involves advanced troubleshooting, managing network and voice infrastructure, implementing upgrades and optimizations, handling critical escalations, and ensuring high availability, security, and performance across the environment.

Key Responsibilities:

  • Lead advanced troubleshooting and RCA for network, firewall, and voice issues.
  • Configure and manage Cisco routing, switching (including Nexus), and firewall solutions.
  • Manage and optimize Cisco firewall and Check Point firewall policies and security.
  • Handle SIP routing, voice call flows, and integration with Cisco voice platforms.
  • Implement network, firewall, and voice changes, upgrades, and optimizations.
  • Ensure high availability, performance, and security across network and voice

environments.

  • Guide L2 engineers and handle escalations.

Technical Expertise:

  • Strong expertise in Cisco routing, switching, and Cisco Nexus (data center switching).
  • Deep knowledge of routing protocols (BGP, OSPF, etc.) and QoS.
  • Hands-on experience with Cisco firewall and Check Point firewall configuration and

troubleshooting.

  • Strong experience in Cisco Voice / VoIP technologies (SIP, CUCM, gateways, SIP routers).
  • Knowledge of NAT, VPN, security policies, and voice traffic optimization.
  • Ability to troubleshoot complex network, firewall, and voice issues end-to-end.

Certifications (Preferred):

  • CCNP (Enterprise / Security / Collaboration)
  • CCNA (mandatory baseline)
  • Check Point CCSA / CCSE
  • Cisco Security / Collaboration certifications (added advantage)