How do I find apartment owners that need a good management company?

[Jason T.]

I've recently made a switch from residential rehabbing and flipping / renting to the apartment management business. I'm working with a guy that has been in the business for 30+ years and knows everything about the management aspect. My role is more of business development so I'm seeking apartment complexes that we can manage. In order to expand I would like to bring on new clients from new relationships, not just referrals (which has been the way of doing things). I need to know how to be able to find out who is and how to get a hold of apartment owners or at least the decision maker.
I would greatly appreciate any help from all of you and especially if you have experience in ownership or management of apartments.