I have experience in system administration: - Linux maintenance (CentOS, Debian, Ubuntu, CoreOS, RHEL); - Cloud hosting (Amazon EC2, RDS, S3, DigitalOcean Droplets); - Virtualization: (Docker, VirtualBox, Vmware, Openvz, Xen, Hyper-V); - Web servers (apache, nginx); - Databases (MySQL, PostgresQL); - Monitoring (zabbix) - Mail servers (postfix, sendmail, antispam/ antivirus: clamav/spamassassin/amavis, courier, dovecot); - FreeBSD maintenance ; - Networking (DHCP, DNS, VPN, OpenVPN, firewalls: iptables/ipfw, qos, proxies); - Windows Server (2008/2012); - Exchange 2007/2010; - Python programming.