Santhosh Narasimula

About Santhosh Narasimula

I am a Principal-level Network & Security Engineer with 10+ years of experience designing, modernizing, and securing enterprise and hybrid cloud infrastructures across AWS, Azure, and on-prem environments. My expertise spans network engineering, cloud architecture, Zero Trust, firewall modernization, WAF and perimeter security, SD-WAN, and enterprise compliance frameworks.I bridge network engineering, security architecture, and InfoSec governance helping organizations build scalable, high-performance, and secure-by-design infrastructures. Network Architecture & Cloud Engineering• Designed multi-region AWS architectures using VPC, TGW, PrivateLink, and centralized inspection.• Built Azure hub-spoke architectures with UDR governance, NSGs, Private Endpoints, and cross-subscription controls.• Delivered EVPN-VXLAN core migrations (Cisco → Arista), SD-WAN modernization, and DNS/DHCP consolidation (Infoblox, Cloudflare).• Architected hybrid cloud connectivity using VPN, Direct Connect alternatives, and identity-aware access patterns. Network Security, Zero Trust & InfoSec• Led 42+ firewall migrations (Palo Alto, Check Point, Fortinet) and unified perimeter strategy (Cloudflare + F5).• Enforced Zero Trust with Cisco ISE, micro-segmentation, application-tier policies, and identity-driven access.• Deployed WAF, bot protection, TLS inspection, and Layer 7 controls to secure global applications.• Aligned controls and architectures with NIST 800-53, FedRAMP, PCI-DSS, and ISO 27001. Automation, Governance & Operational Excellence• Automated core network and security deployments with Ansible/Python, reducing manual effort by 75%.• Strengthened compliance posture through SIEM integrations (XSIAM, New Relic, Loki/Grafana) and improved incident response workflows.• Standardized firewall rule lifecycle management, logging governance, and cloud onboarding frameworks.I thrive at leading transformation initiatives that unify high-performance networking with strong security governance. I’m passionate about building scalable architecture, mentoring engineering teams, reducing risk exposure, and driving cloud modernization strategies that accelerate business outcomes.

Experience

1. Lead Network Security Engineer

   OCLC

   Feb 2024 — Present · Dublin, OH, US

Education

• Gannon University

  masters, Electrical and Electronics Engineering

• JNTUH College of Engineering Hyderabad

  Bachelor's degree, Electrical, Electronics and Communications Engineering