I'm a guru with almost 15 years of experience doing everything from system management to forensics to software design. I'm intimately familiar with Fedora and their flavor of applications and tools and have been performance tuning it since Fedora was still RH.
I was the lead systems administrator at an internet service provider, where I spent plenty of time making applications play nicely with each other. I'm aware of Joomla but don't have much experience with it, but WordPress I know very well.
I can tender references if you'd like, but I can guarantee each and every one of them will sing my praises, so your time would be better spent letting me dig in to my little black bag and unleash my arsenal of tools on your ailing server so we can get you back up to speed as soon as possible.
With regards,
Tom Howell-Cintron
thowellcintron(at)gmail(dot)com