What advice would you give a customer looking to hire a provider in your area of work?
As the real estate market has declined, more and more real estate licensees and unlicensed individuals have declared themselves "Property Managers."
Sadly, that's like you declaring yourself a "Brain Surgeon." It works great until there is a problem.
In GA, it is illegal to manage the property of another for a fee under most situations without a real estate Broker's license. So the #1 requirement is that they are licensed.
Property Management and Real Estate Sales require the same license and are regulated by the same body. Beyond that they are nearly opposite in the skills and systems required to perform them well. The #2 requirement for your property manager should be that they are a Property Manager - full time - that's what they do.
#3 (and I could go on and on) is their record in court. If something goes wrong, that is where you are going to end up. Ask your potential Property Manager what their record in court is. Poke around a little. Try to see if you can hear the stories. Hopefully you can judge from that whether they are familiar with the law and the court system. (Just FYI, I try anything to keep you out of court - it is a no win situation. In the times I have had to go, I have an undefeated record - call for stories.)