* Server: Dell, Cisco UCS, IBM AIX, HP * OS Platform : Centos, Redhat, Ubuntu, Debian, Suse Linux, Windows 2012 * Virtualization: VMware ESXI, Hyper-V, VMware Workstation, VirtualBox. * VOIP : Asterisk, Elastix, FreePBX, Cisco Call Manager * Monitoring:zabbix,nagios, graphite * Application Server : DNS, FTP, NTP, DHCP, OpenVPN, PPTP, Proxy, Samba etc. * Network: Switch, router, wireless access point, VPN, VLAN, WLAN,firewalls (Cisco, Juniper, Dlink, Huawei) * Firewall : Linux iptables. * Scripting: Shell, Python * Antivirus : Sophos, Kaspersky * IT Support: Installing,configure,troubleshooting computer hardware, software, systems, networks, printers and scanners