GOUTHAM KOSARAJU

Architected resilient core banking networks utilizing Cisco ACI spine-leaf architecture and BGP/MPLS integration, ensuring high availability and performance for critical financial services.

Automated DNS, firewall, and router configurations with Python and Ansible, streamlining network changes and reducing manual efforts by an estimated 20%.

Deployed and managed Cisco SD-WAN (Viptela) overlays, integrating with Azure Virtual WAN to establish secure, high-performance hybrid cloud connectivity for enterprise branches.

Proactively monitored enterprise DNS traffic and network flows using Splunk and Grafana, enhancing anomaly detection and reducing potential outages by 15%.

Configured and validated Fortinet and Palo Alto firewalls in High Availability (HA) mode, ensuring seamless data center failover and maintaining 99.99% network uptime.

Designed and maintained complex optical cable infrastructures (CWDM/DWDM, PON modules) and led Ericsson 5G RAN deployments, optimizing network backbone and wireless efficiency.

Automated network configurations and deployments using Python, Ansible, and Terraform, resulting in over 100 man-hours saved annually and improved operational efficiency.

Implemented Palo Alto Networks' next-gen firewalls (Prisma Access, Prisma Cloud) and migrated legacy platforms (Checkpoint, Juniper, ASA) using MT 3.3, enhancing overall security posture by 25%.

Monitored and analyzed over 300 network devices using NetScout nGenius, SolarWinds, Splunk, and Wireshark, reducing Mean Time to Resolution (MTTR) by 40% and ensuring 99.9% SLA compliance.

Scaled data center backbones using Cisco Nexus 3000/5000/7000 (VPC, VXLAN), achieving over 10 Tbps throughput and maintaining 99.9% uptime.

Deployed Next-Generation Firewalls (NGFW) including Fortinet and Cisco ASA, along with IPS/IDS and VPNs, to strengthen enterprise edge security and mitigate threats.

Configured and troubleshot a wide range of Cisco routers (ASR, ISR series) and Catalyst switches across Access, Distribution, and Core layers, ensuring network stability and performing IOS upgrades.

Managed 24/7 on-call incident response for nationwide enterprise branches and data centers, resolving critical network issues within defined SLAs.

Configured and maintained secure site-to-site IPsec VPNs across MPLS backbone and internet using Cisco ASA and Checkpoint firewalls, ensuring secure branch-to-DC connectivity for over 100 locations.

Provided comprehensive technical support for service request tickets, encompassing troubleshooting, maintenance, upgrades, and patches, significantly improving issue resolution times.

Maintained network devices and enforced security policies across 100+ VLANs, ensuring network segmentation and compliance.

Troubleshot and resolved Layer 2/3 issues, including Spanning Tree Protocol (STP) and routing protocols, on Cisco 6500 series switches, reducing network downtime by 10%.

Implemented secure IPsec site-to-site VPNs over the internet using 3DES and AES/AES-256 with ASA 5505 firewalls, ensuring data integrity and confidentiality.

Configured, monitored, and troubleshot Cisco ASA 5500/PIX security appliances, including failover, DMZ zoning, VLANs, routing, and NAT, enhancing network security by 15%.

Performed comprehensive Windows Server (2008/2012) and RedHat Linux system administration, along with improving network traffic flow by 25% through bandwidth optimization and load balancing.