Network Administrator L2 & L3

Tata Consultancy Services; Chennai District; On-site; INR 600,000 - 900,000; Full time

Job summary

Tata Consultancy Services is seeking a Network Operations professional in Chennai to administer LAN, WAN, WLAN, and Internet connectivity, monitor performance, and ensure uptime.

You will configure routers, switches, wireless controllers, firewalls, and VPN devices, while supporting incident and problem management and contributing to automation initiatives.

Responsibilities

• Administer and support LAN, WAN, WLAN, and Internet connectivity.
• Monitor network performance, availability, and capacity using standard tools.
• Perform incident management, troubleshooting & root cause analysis.
• Ensure network uptime and adherence to SLAs.
• Configure & maintain routers, switches & wireless controllers.
• Perform basic firewall & VPN device administration.
• Execute standard changes, patching, firmware upgrades & backups.
• Implement approved network design changes following standards.
• Administer firewall rules & VPN user settings.
• Support network segmentation and access controls.
• Help ensure compliance with security and governance requirements.
• Assist in vulnerability remediation & audit activities.
• Monitor alerts, logs & events; take proactive preventive actions.
• Maintain diagrams, documentation & network asset inventory.
• Update runbooks, SOPs & operational procedures.
• Work with Network Architects/Sr. Engineers for complex issues.
• Coordinate with vendors & ISPs for issue resolution.
• Escalate unresolved issues per ITIL/Incident Management process.
• Identify recurring problems & contribute to longterm fixes.
• Participate in problem management & PIR discussions.
• Support automation & network standardization initiatives.

Job description

Key Responsibilities*

Network Operations & Support

Administer and support LAN, WAN, WLAN, and Internet connectivity.

Monitor network performance, availability, and capacity using standard tools.

Perform incident management, troubleshooting & root cause analysis.

Ensure network uptime and adherence to SLAs.

Configuration & Maintenance

Configure & maintain routers, switches & wireless controllers.

Perform basic firewall & VPN device administration.

Execute standard changes, patching, firmware upgrades & backups.

Implement approved network design changes following standards.

Security & Compliance

Administer firewall rules & VPN user settings.

Support network segmentation and access controls.

Help ensure compliance with security and governance requirements.

Assist in vulnerability remediation & audit activities.

Monitoring & Documentation

Monitor alerts, logs & events; take proactive preventive actions.

Maintain diagrams, documentation & network asset inventory.

Update runbooks, SOPs & operational procedures.

Collaboration & Escalation

Work with Network Architects/Sr. Engineers for complex issues.

Coordinate with vendors & ISPs for issue resolution.

Escalate unresolved issues per ITIL/Incident Management process.

Continuous Improvement

Identify recurring problems & contribute to longterm fixes.

Participate in problem management & PIR discussions.

Support automation & network standardization initiatives.