MS-Columbus, Enterprise Routing/switching experience (L2/L3), including maintaining and troubleshooting network hardware, firewall, routing and switching (Cisco desired). Knowledge of network protocols and applications including RADIUS, SNMP, SYSLOG, TACACS, DNS, DHCP, IPSec, NAT, ACLs. Strong troubleshooting, documentation, and verbal/written communication abilities. Technology Stack : Proxies ( Blue Coat) /