Arkadiy Ayrapetov

Responsible for network security on the NYC Metro subway system OT/IT Lead OT security for North America's largest transit network: 7,900+ switches, 2,300+ routers Developed Python automation for AAA/TACACS/Splunk, upgraded 5,100 switches in 2 months Implemented IEC 62443 standards with Cisco ISE for critical infrastructure security Orchestrated private LTE integration with Airspan for subway communications Deployed segmented industrial networks with Siemens Ruggedcom for rail systems

Led a comprehensive security overhaul, migrating from Fortinet FortiGate 60F to Meraki MX450 Next-Generation Firewalls, significantly enhancing the security posture for a legal organization handling sensitive data across 16 remote locations. Designed and implemented a robust network segmentation strategy, creating 13 distinct VLANs (e.g., servers, IoT devices, Wi-Fi) across 50+ Cisco Catalyst 9200 and Meraki MS250 switches, reducing the potential attack surface and limiting lateral movement.

Led healthcare network security & infrastructure for 15 medical facilities Managed Cisco network environment: ASA/FTD firewalls, ISE, switches, routers Implemented VPN solutions supporting 5,000+ users Orchestrated datacenter migration with 99.999% uptime Led network standardization across 30-floor hospital complex

Designed and secured network infrastructure for 20+ enterprise buildings (16 NYC locations + industrial sites) Implemented Layer 3 spine-leaf architecture with VXLAN/EVPN for high-performance environments Deployed Fortinet security ecosystem: FortiGate 1800F/1500D/90G firewalls, SD-WAN, segmented 20+ VLANs Led Zero Trust implementation across multiple sites, reducing security incidents 80% Managed redundant datacenter design supporting 500+ industrial endpoints