Jan 2021 – Dec 2025 · 4 yrs 11 mos · Chennai, Tamil Nadu, India · On-site

• Handled firewall operations including alert monitoring, threat log analysis, and session tracing on Palo Alto firewalls. Onboarded and managed devices in Strata Cloud Manager (SCM), coordinated with CSP for API troubleshooting and log sync validation. Configured and deployed security policies, NAT rules, decryption profiles, and application filters through Panorama. Executed firewall rule simulations and impact assessments using Tufin SecureTrack and implemented changes via SecureChange workflows. Monitored infrastructure using SolarWinds, ThousandEyes, NetMRI and escalated anomalies per standard procedures. Administered DNS and DHCP via Infoblox including zone creation, record updates, IP allocation, and reverse DNS validation. Tracked and validated SSL certificate expiration, import/export operations and renewal steps on F5 LTM devices. Managed CRQ/RITM/IM lifecycle using ServiceNow ensuring timely approvals, tagging, SLA compliance, and audit traceability. Facilitated firewall changes during CAB calls following Doer-Checker model and documented rollback and health check plans. Triaged security events using Splunk ES and Kibana dashboards, escalated actionable incidents with evidence to higher level teams teams. Led service request tasks like firewall access provisioning, VPN diagnostics, and policy queries. Created and maintained process documentation, SOPs, RCA templates, shift handover logs, and KT material for new joiners. Supported asset discovery and compliance reporting using Nlyte tool integrated with CMDB and ServiceNow workflows. Contributed to incident review meetings, submitted RCA reports, and ensured ticket hygiene with clear status updates and timelines.