Neeraj Kumar Dirisala

About Neeraj Kumar Dirisala

Senior Network Security Engineer with 6+ years of experience designing, securing, and optimizing enterprise and hybrid-cloud infrastructures across financial, healthcare, and technology sectors. Specialized in multi-vendor firewalls, F5 load balancing, cloud-native security, and automation (Ansible, Terraform, Python).Proven expertise in large-scale migrations, Zero Trust/SASE, segmentation, and SEV1 incident response for mission-critical environments. Skilled at integrating IAM, WAF, and cloud-native controls (AWS, Azure) to enforce enterprise-grade security. Known for driving automation, minimizing downtime, and strengthening compliance in multi-cloud deployments. Reduced risk exposure and optimized performance at scale.

Experience

1. Cisco Barclays Bank, Charlotte, Nc

   Barclays

   Jan 2026 — Present · Charlotte, NC, US

   I led data center MRA initiatives, driving installation, migration, hardware refresh, and decommissioning of firewalls, load balancers, and Nexus switching infrastructure across production environments. I managed Fortinet FortiGate firewalls, designing and enforcing security policies, NAT strategies, and VPN connectivity while resolving complex traffic and security issues. My experience includes architecting and managing F5 BIG-IP LTM and GTM solutions with advanced VIP configurations, health monitoring, persistence strategies, and global traffic distribution for high availability. I directed routing and switching operations across Cisco Nexus platforms, optimizing VLAN segmentation and leveraging BGP and OSPF for resilient network design. Additionally, I engineered Cisco ACI fabric policies, managing EPGs, bridge domains, and contracts while troubleshooting application connectivity challenges. I supported enterprise DNS, DHCP, and IPAM services using Infoblox and performed deep packet and traffic flow analysis to resolve critical issues. I improved network stability through ELK-based monitoring and telemetry, enforced secure access using and TACACS+, and led large-scale data center migrations. As an escalation point for major incidents, I drove end-to-end troubleshooting, produced detailed RCA documentation, and enhanced network resilience through standardization and automation using Python and Ansible.