Keerthi Kumar G

Experienced network and security professional with 6+ years in firewall management, IPsec VPN setup, and network infrastructure. Expertise includes Cisco ASA, Palo Alto, F5 Load Balancers, Fortigate and routing protocols like BGP and OSPF.

Accenture

• Designed and implemented secure network architectures, including DMZs and security zones, across 20+ sites using Palo Alto Networks firewalls.
• Led large-scale IPsec VPN deployments and migrations (90+ tunnels) across Cisco ASA and Palo Alto environments.
• Played a key role in ISP migration projects, ensuring seamless transition through cross-team coordination with network, system, and business stakeholders.
• Managed firewall lifecycle activities including onboarding new high-end devices, decommissioning legacy systems, and performing OS upgrades.
• Executed migrations from Cisco ASA to Palo Alto firewalls aligned with industry best practices.
• Configured and maintained advanced firewall features: VLANs, routing (BGP/static), NAT, HA, TACACS+, DHCP, DNS, syslogs, and security services.
• Implemented centralized firewall management using Panorama (templates and stacks).
• Supported F5 load balancer configurations (VIPs) and coordinated NAT updates during public IP migrations.
• Handled end-to-end change management, IP address planning (IPAM), and inter-team coordination (LAN, Linux, Windows, AD).
• Delivered operational support, troubleshooting, and post-migration hypercare to ensure stability and performance.
• Produced network diagrams, technical documentation, and implementation plans for new deployments.

Cognizant

• Provided 24x7 operational supports to all production practices on holidays and weekends as a part of Network

Operations.

• Troubleshooting in Cisco ASA firewall
• URL Configuration in BIG IP F5 LTM & GTM (configuring pools, virtual IPs, SSL profiles, health monitors, SNAT &

WIDE IPs)

• Enrolling and renewing of certificates from CA.
• Implementing iRules as provided by application delivery team.
• Switching live traffic between data centers in LTM/GTM during planned activities.
• Migration of URLs from legacy to new data centers.
• Troubleshooting URL connectivity issues in LTM/GTM.
• Prepare and implement Access Control Lists and NAT in ASA, FWSM and Checkpoint firewalls.
• Periodic reporting of ACL utilization in FWSM.
• Blocking malicious IP in all perimeter firewalls as advised by Information Security Team.
• Configuring IPSEC Site-Site VPN in Checkpoint and ASA Firewalls.
• Packet capture analysis to troubleshoot Latency and other issues using Wireshark.
• Implementation and troubleshooting of routing protocols like EIGRP ,OSPF and BGP
• Handling Network outages by ensuring proper co-ordination between the end users and the service providers to get a swift resolution.
• Addition of contracts in Cisco ACI.
• Joining bridge calls with all stake holders during Agent/Partner connectivity issues.

B.Tech