Centos Linux Server Admin

Hi Experts, NOTE: TEMPLATE BIDDING WILL BE IGNORED. You must respond to our requirements below: We are looking for a very skilled Linux server (Centos) admin that has a good understanding of MySQL to call on when needed on an hourly basis. The first job will be to investigate why our MySQL server crashes from time to time. You must also be good at security as we would like to make sure that our server is secure from hackers. Please state your experience as a Linux server admin. Thanks in advance.