I'll second the Ares Gear Aegis. From your post it sounds like you want something that you can don/doff all your kit at once like a patrol guy, but in my experience I can carry everything I need, concealed in appropriate "Agent Casual" using an Ares Aegis belt threaded thru the loops. I keep my equipment on all day for 10-14 hours a day, 5+ days a week. If you need to be more dressy you can upgrade to a Mean Gene using the same buckle.
If you MUST drop all your kit to settle into that comfy office lifestyle (or to make those jaunts into booking or a secure facility easier) with nothing on your waist the only thing I can think of that I've personally used that I like are either the Jones Tactical inner/outer belt or the Unity Clutch. Neither however are appropriate for non-concealed use in a tucked in shirt with a jacket if that's how you roll, you'll have to be untucked shirt. The buckles are "tactical" or non-existent and not professional.
I've also used a Crye MRB for low-profile, but again, it's not appropriate for agent or dress casual... more tacticasual.