Windows XP/7, Windows 2003 and 2008 Server Administration, WSUS patch update server, Linux System Administration (Debian/Red Hat), DNS Administration (bind),HTML,IP Packet Analysis - Ethereal, Intrusion Detection - Snort/ACID,Apache, DHCP, MySQL, SAMBA, SSH Administration, Domain Name Systems (DNS), Dynamic Host Configuration Protocol (DHCP), Simple Mail Transfer Protocol (SMTP), LAN/WAN Administration, Cisco switches and routers, McAfee EPO sever, Network Access Control (NAC) in open source like FreeNAC, Packetfence, MAC bypass authentication and 802.1x authentication.