make server secure

Hello, I have my own vserver with root access. I want somebody trustable who knows his stuff and who can make this server secure and safe and also finds a solution how to backup the server in such a way, that I can easily restore it. On the server, there's a cvs server running, this data is extremely important, also the mail configure data. I'm accessing the server via ssh. Max Odendahl ## Deliverables I need a complete report what to do to minimize the risk of getting hacked in any way ## Platform Ret Hat Linux 7.3