If you search for "Property Manager" you will find companies that can handle rentals for you. There are many programs available from just collecting rent...or rent and property maintenance. You can have any or only a few services.
Check with your local RE companies to see if they have a property management specialist. Most national chains will offer the service. You can also search for property mgt companies that specialize in the type of property you own, single family or condo for example.