Hardware: error troubleshooting and repair Software: Windows desktop and server, Linux ( Debian, Ubuntu, Centos, etc. ) administration and implementation, error troubleshooting and repair Networking: Implementation and administration complex enviroment, vlan, VPN, multiple subnet and gateways, wireless implementation, kiosk, hotspot, firewall troubleshooting, pfSense administration, Unifi Administration, Ubiquiti devices administration, Mikrotik, Raspberry, IoT ( Shelly, Sonoff ) Firewall: Pfsense, IPcop, USG Ubiquiti Mail server: Zimbra, Postfix Web Hosting CP: Plesk, Cpanel, Virtualmin Virtualization: Vmware ESXi, Proxmox, KVM, XenServer, Qnap, Synology NAS Languages: Python, Go, HTML5, Php Google G Suite and Office 365 implementation