What i can perform for you :
o Help optimize performance of the server
o Help perform server security hardening
My normal security auditing procedure
1, Disable unwanted services, users and ports
2, Install CSF firewall and configure it
3, Change ssh port
4, /tmp hardening
5, Apache, PHP and Mysql hardening
6, ClamAV antivirus install
7, mod_ security install for Apache
8, mod_evansive for DDOS protection
9, Removal of unused software - prevents exploits and wasted resources
10, rootkit finder install ( chkrootkit/rkhunter )
11, Configure SSL for your website.