What you need are good processes and a common way of expressing how these processes are adhered to. Get yourself ITIL certified and make sure that either the person you hire is certified or that is the first thing you have them do. You don't have to be a big shop for this to be relevant.
On a day-to-day level you need to be the person who is accountable for any and all changes, which mean you must approve them. Yes, you are handing over the keys, but not permission to run roughshod over the environment.
Also, a good manager "inspects" but does not "micromanage". If you keep this principle in mind and establish some good processes, you will be golden.