Job Description
About the Role
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nOperations & Uptime Maintain and support Routing and Switching, Cisco Catalyst/Nexus, Juniper EX, Cisco Routers, Juniper MX, and firewalls (Fortinet, Palo Alto PAN‑OS, Cisco ASA/FTD, Juniper SRX, Check Point). Ensure 99.9%+ availability through proactive monitoring, capacity planning, and preventive maintenance.
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nResponsibilities
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- Operations & Uptime n
- Maintain and support Cisco Catalyst/Nexus, Juniper EX, Cisco Routers, Juniper MX, and firewalls (Fortinet, Palo Alto PAN‑OS, Cisco ASA/FTD, Juniper SRX, Check Point).n
- Ensure 99.9%+ availability through proactive monitoring, capacity planning, and preventive maintenance.n
- Incident Response & Troubleshooting n
- Triage, isolate, and resolve L2/L3 connectivity, security policy, NAT, VPN, HA failover, and performance issues.n
- Perform root cause analysis (RCA) and implement corrective/preventive actions.n
- Configuration Management n
- Maintain standardized, secure configurations (hardening baselines, AAA/TACACS+/RADIUS, Syslog, NTP).n




- Version control for configs; follow change management (ITIL) with rollback plans.n
- Monitoring & Observability n
- Implement SNMP/NETCONF/REST APIs, Syslog, NetFlow/sFlow/IPFIX, and platform-specific telemetry.n
- Define alert thresholds for CPU, memory, interfaces, PSU/temperature, VPN/HA state, and security events.n
- Security & Compliance n
- Enforce firewall policies, segmentation (VLANs/VXLAN), micro/macro segmentation standards.n
- Patch and upgrade devices, validate against compliance benchmarks (e.g., CIS).n
- Automation & Scripting n
- Use Python/Ansible (or vendor tools) for backups, audits, bulk changes, and compliance checks.n
- Documentation & Knowledge Sharing n
- Maintain network diagrams, IPAM, runbooks, RCA reports, and standards.n
- Provide training and collaborate across NOC/Infra/Security/Application teams.n

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nQualifications
nAny Degree
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nExperience
n3 Years to 6 Years
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📌 Senior Network Engineer (Tamil Nadu)
🏢 Tata Consultancy Services
📍 Tamil Nadu