Basically I'm trying to find a recommended firm that can handle the following situation:
We host a site that is deeply entwined with vBulletin, and over the past few months we've run into multiple problems with spam, spam sign ups, spam posts, etc.
We need to have someone or a group come in and bring the vBulletin system up to date, and change some features around.
The issue with this is the site is finance based and providing access to the back end is extremely risky. So we're trying to avoid using individual contractors, as insurance/legal protections come into play.
So it is my hope that someone here can recommend a firm that would have php experts on staff that we could contract with.
Choose any IT firm which have experience and expertise both. I am sure by searching on Google you can find a lot of companies, choose according to your budget and don't forget to discuss about legal issues in contracts.
Probably would be an idea to search locally first, see if there are any web design companies near to where you are located - get them in or go over to their premises for meeting to discuss your requirements etc.