My name is Denis Koroliov. I'm a system administrator with 7 years of expirience. I'm worked with a different technologies based on windows and linux systems. Have expirience in next: Windows(AD,DNS,File servers, Exchange, WSUS,IIS, SQL) Linux(Apache,Nginx,SQUID,FTP,NAT, Mail servers(postfix,dovecot etc), MySQL, Postgress SQL, PHP, system sequrity) Different technologies like a common proxy, FTP, Monitoring sevices like a zabbix etc. I can guarante you the best quality of work and support in future