I can't recommend MattW highly enough. I asked him to help me tune my existing dedicated server but he wound up suggesting that a better alternative would be to move to a better server. He suggested one that he knew of which will save me about $100 a month from what I was paying for the old server.
He set up the new server, installed litespeed, moved 2 forums, converted tables from iamsam to innodb, installed elastic search, and made it all work perfectly.
If you are looking for someone to help with your server you can hire MattW with confidence that he has the skills to do the job.