Microsoft Windows Server 2003, 2008 & 2012, Active Directory, DNS, DHCP, Clustering, IIS 5, 6, 7.5, 8, Windows XP, 7 & 8.Microsoft SQL Server 2000, 2003 & 2008, Installation, Clustering & Administration,Microsoft Exchange Server 2003, 2007 Installation & Administration.Redhat Linux, Ubuntu, ClearOS.RadWare & CA NetScaller Load Balancer.vMware vSphere 5.0Citrix XenAppSendmail, Squrial Mail, MySQL, Apache, Tomcat, JBOSS