Some Animal Removal and most Rodent control companies will do this. After they chase out any live animals be sure they vacuum all debris, and spray with disinfecting odor killer. And of course, close up all openings big enough for rodents or insects either with sealant or screening. If the animals nibbled their way through a small initial opening, it may take sheeet metal to stop them from trying to nibble back in again the same place.
If you click on the Home > Animal Removal link right below your question, you might be interested to read some of the other comments and answers on attic animal removal and cleanup. There are also a few entries under Home > Pest Control, including one I can think of in the past couple of days - here -
https://answers.angieslist.com/Who-I-...