Are you interested in working for a trash out company, or do you need one to do work for?
It might sound silly, but I would go to www.hudhomestore.com. These are government owned foreclosures. Search for the area you are interested in, and look at the specific details of some of the homes. It will post contact information on property management. Call these people! They probably did the trash out or hired the people who did the trash out for that specific home.