Server maintenance (qa, dev, staging, production environments, ~100 servers in common), VPN setup and maintenance (Juniper SA and MAG series), Anti-virus protection (Vipre, Symantec), Backups and monitoring (Labtech, New Relic, Amazon Web Services).
Setup, maintenance and support of entire IT infrastructure in the office (~50 employees). SCS and LAN setup and maintenance (HP and mikrotik equipment, WIn2008 R2 server), account control, VPN access, equipment purchase, helpdesk.
Supporting entire software network for this 70-employee company (LAN, Internet), helpdesk, technical support, maintenance of all office equipment (computers, printers, IP-phones, etc.), SCS organization, servers maintenance (Windows Server 2003/2008), network hardware (HP, D-Link, Zyxel) configuring and maintenance, backups.