I am looking for someone to clean up mold in my attic, and I have been advised to find someone who is licensed in the area of mold. I’ve checked HomeAdvisor and BBB, but it’s not clear to me who actually has a mold license for my state (Illinois) or if such a license even exists.

How do I go about finding out who, in Illinois, licenses such professionals or even what credentials to ask for? Are they licensed by City? State? County? Is there a registry?

As an aside, How do I find someone to do this work?