Linux Server Management

We want to Host our website to VPS linux Hosting with Whm and CPANEL. we need an expart who secure our server. Like Close unused port, Security on Mail and other security measure. priviously some hackers was upload files in our system and they was also create email id in our server.

So we need an expart on linux and securiy. if you think you are eligible so give me a complete proposal how you setup.