I'm assuming you are looking at Sheffield Court as a prospective place to buy? If so, your buyers' agent should be able to contact a listing agent and find out the name of the management company that handles Sheffield Court's account.
If you are not working with a buyer's agent yet, contact me. I'll be happy to get that information for you.
If you are a condo seller, you should have the name of the property manager in your condo documents. As an owner, the property manager is responsible to you to provide you with information that you need.