Administered large networks, with more than 700 clients, having MS AD, based on windows 2008 and windows 2012 domain controllers, part of them being virtual machines, virtual servers and part of them phisical machines (servers, desktops, workstation, laptops). Worked with windows based computers, Apple devices (mac mini, mac book, iPad), asured connection and access to network for mobile devices (BYOD), following security policies.