Design, configure, and maintain LAN/WAN infrastructure using Cisco and Arista switches and routers. Deploy and manage SD-WAN solutions (e.g., Cisco Viptela, Meraki, Fortinet, or Versa). Supporting SD-WAN routing overlays and underlays Designing and implementing Layer 2 networks for enterprise and data center environments Troubleshooting broadcast storms, loop issues, and port flapping Performing switch upgrades and firmware management Configuring switch stacks and chassis-based systems Managing switch ACLs and security policies Monitoring switch performance and port utilization Designing and implementing & supporting Layer 3 wireless networks for WAN and data center connectivity including access points, controllers, Configuring and troubleshooting routing protocols in multi-vendor environments Managing Internet edge routing and peering with ISPs Implementing route filtering and prefix lists Diagnosing routing loops, black holes, and asymmetric routing issues Monitor network performance and troubleshoot connectivity issues across wired and wireless environments Collaborate with security teams to ensure network compliance and implement firewall policies Perform n etwork upgrades, patching, and lifecycle management of hardware and software Maintain detailed documentation of network configurations, diagrams, and operational procedures Participate in on-call rotation and respond to network incidents and outages Work with vendors and service providers to resolve issues and optimize performance