• Windows 2003/8 Active Directory, Exchange 2003/7 and SQL 2005 including clustering • VMWare ESX Server 3.x/Virtual Center, vSphere 4/vCenter and P2V administration• Management of NAS/SAN servers on the NetApp/EMC platform • Wireless rollout and maintenance including 802.11a/b/g • LAN/WAN routing and switching including Cisco and Extreme platforms• Firewall administration with Checkpoint, Cisco and IPTables• CentOS 5.x, Suse 9/10 and Redhat administration Building and maintaining mission-critical networks.