I am a system administrator with experience over 15 years. I have experience in administration of Linux & Windows servers. I have knowledges of DNS, DHCP, NTP NAT, Routing, Secure Mail Servers, Web Servers, Database, FTP, Proxy, OpenVPN and other network Servers and Services based on Windows and Linux platform, LDAP authentification integration. I can configure very standardized mail-server with greylisting, antivirus scanner, IMAP/POP3 accounts, SASL, SSL/TLS, DKIM, SPF, IP Telephony(VoIP), IIS. I have professional knowledge’s of Network and Applications Monitoring systems and tools (such as CA Spectrum, Zabbix, Nagios, MS SCOMand other). My network skills: I have knowledges of shell-scripting. Additionally, i have development experience (it's my university specialization), good experience of development on Delphi Studio.