Migration infrastructure to Hetzner VPS, configuring Vmware ESXi hosts.Upgrading server and user OS, replacement of obsolete equipment.Duplication of critical services.Setting up monitoring systems (Zabbix, NetFlow Analyzer) and backups (Acronis, Veeam).Administration of Win2012R2, Centos 7 (LAMP/LEMP).

Network maintenance (FreeBSD, win XP, 7, 2008R2), configuration of active network equipment.Purchase, assembly, repair, testing of PC components.Maintenance and processing of central monitoring console data (fire and burglar alarm).Administration and network monitoring, high availability, channel redundancy, host failure alerts, VPN.Creation of website, managing website content, setting up the corporate mail.

Administration of Windows Server 2012, Hyper-V.Maintenance of uninterrupted work of call-center and office, communication with the support of the main office.Maintenance of Asterisk, GSM-gateways.Supervision of monthly product updates.

Administration of Vmware ESXi, Debian/Ubuntu/Centos Linux, Windows 7-2012R2 (LDAP, Zimbra, squid, Veeam, AD, RDP).Accounting software, components and supplies, procurement planning.Update and support software for design and accountants.Log collection and analysis, writing documentation.

Administration of Linux (Debian/Ubuntu: LTSP, squid).Consultation and training of personnel to work with Linux environment.

Administration of Windows network and office equipment, access control, logs analysis.Supporting the work of geographically dispersed 12 offices.Upgrade, testing, repairing PC.Negotiating with suppliers of equipment and communications.Installing and configuring the software (firewall, antivirus, proxy, mail, backup).Consultation and training of personnel to work with PC.Cabling, PBX maintenance.