12+ years of experience administering Linux and Windows Servers. During last years my objectives were to design, implement and maintain large, high available and high load network infrastructures. My skills are in building and administering time critical Linux and windows systems and clusters as well as single node systems.
I have experience in:
* Linux Clustering and HA
* Cloud Computing
* Amazon EC2
* MySQL Administration,Server optimization
* Linux Firewall, networking and Security Concepts
* Design, deployment and administration of multi node web farms
* Service level load balancing and clustering
* Linux services (WEB,MAIL,PROXY,DNS,LDAP,SAMBA,ZIMBRA, etc)
* OS security concepts
* Monitoring tools and solutions (Nagios, Munin, SNMP etc)
* Bash scripting
* Virtualization solutions (VMWare, XEN, CITRIX, OpenVZ, etc)
* Advanced Windows Cluster Administration
* Document Management System (Alfresco)
* Active Directory deployment and administration
* Network Administration
* Network Security (Penetration Testing)
* Server Auditing
* Technical Support
* Web hosting Control panels such as cPanel,Plesk,DirectAdmin
* Data recovery
* Asterisk/Trixbox/Elastix/VoIP solutions.