Property Management Companies

[Joe R.]

Hello, I joined Biggerpockets.com as per a recommendation from a friend. I currently own 1 rental property in NJ that I self manage. I would like to expand my portfolio and I am interested in obtaining advice from people who have purchased out of state properties and use a property management company to take care of it. 

Where can I find a database of property management companies? and what should I look for in a reputable company? 

Thanks in advance