Installation/Configuration / Troubleshooting on below technologies: - Operating Systems: Windows Server 2012 R2 / 2012 / 2008 R2 / 2008 / 2003. Windows 8.1, Windows 8, Windows 7, Windows Vista, Windows XP. Windows Roles server – DNS, DHCP, Network Load balancing (NLB), VPN, Direct Access (DA), WINS, NPS, Remote Desktop Gateway (RDG), Hyper-V, Active Directory, Exchange 2007, Exchange 2010, Exchange 2013 ,Exchange online, SQL server 2012, SQL server 2014 and SQL server 2016 etc. PowerShell Scripting. Computer networking knowledge (OSI model, routers, switches, hubs, repeaters, VLAN, VTP, DHCP, IPv4, IPv6)