Proven demonstrated senior-level experience working in an enterprise IT organization, with a concentration in one or more of the following areas: LAN/WAN, Storage (SAN, NAS, etc.), Voice Engineering, Systems Infrastructure Development, Integration Services, Interoperability or Engineering. This includes but not limited to: Firewalls, DMZ, WAN, LAN, WLAN and VPN communications, load balancers, firmware upgrades, hardware replacement, hardware procurement, network hardware/software maintenance, VoIP/PBX systems, SAN switching in VMware environment, and all other virtual switching environments.