Linux: Raising servers with the functions of an Internet gateway, DHCP server, DNS server, Squid proxy server based on Debian Linux.

Linux: Installation and support NFS network storages on Debian Linux for video surveillance systems.

Asterisk: Transfer of office telephony from analog telephone lines to SIP-telephony based on Asterisk.

Windows: Installation and support of workstations based on the OS Windows 10.

Maintenance of servers based on Windows Server 2008 OS (file servers, RemoteApp).