Windows 2003/2008 R2 Server, MS Exchange (2003-2007-2010), Lotus Domino, Microsoft Lync 2010, MS SharePoint 2007/2010, Microsoft HYPER-V; DFS-R, Microsoft Namespaces, File Replication Services, WSUS, DHCP, DNS, WINS servers configuration and administration, Networking, routing and related protocols, i.e. TCP/IP, SMTP, FTP, OSPF, CISCO routers and switches configuration, Cisco IOS, Wireless networks configuration, Backup solutions (Symantec Backup Exec, Symantec NetBackup), VMware ESXi, VSphere installation, configuration and administration, IPSec, SSL VPN configuration, Web servers (IIS, Apache), ASP and PHP configuration, Unix/Linux (MacOS, BSD, RedHat variants) CCNA, Network+, A+, ITIL certified