During my LEO days, I would carry my duty gun and/or off-duty gun to the station and back home in a paddle holster. I used the Kramer horsehide paddle holster - guns used were a variety of SIG DA/SA pistols. It worked well for that duty.
Our Detectives and Admin types got issued a Safariland paddle holster - though a few of them had their own concealed carry holsters. Several of them liked to take thier gun off (in the paddle holster) and place it in their briefcase or desk drawer.
I don't have one at this time, but have looked at the Comp Tac Paddle holster a few times - just haven't "pulled the trigger" on buying it.
Paddle Holster-Speed-Neutral (comp-tac.com)
Those that have the Comp Tac Paddle, speak pretty highly of it.