Over the last 6 years, I have worked as technical support engineer/teamlead for Viettel Coporation ( this is biggiest mobile service company with 300 of servers from biggest as Sun Fire M9000 to Dell server 2950), business application company with several clusters based on tomcat applications.
My competency lies in deployment/setup from scratch of new production environments, troubleshooting/support of existing production systems based on Linux/Unix. Have a much experience in automation/monitoring/backup of... and administrator oracle database system