Support windows servers (Windows2003, 2008, 2008r2, 2012 Server), too services which can be configured on them (Active Directory, GPO, VPN (pptp, l2tp, sstp), WSUS, ISA, F?reFront, MsSql, Exchange, MDaemon, openvpn, kerio), more details about my experiences you can see on my profile page from another freelancer site http://www.freelancer.com/u/vova33.html