Serious question here. Why "obviously" inside the waistband? Even an IWB doesn't completely conceal the handgun when worn with a tucked in shirt. The wearer has to have something showing above the belt line...has to be able to draw the pistol without having to reach all the way down inside the pants below the waistline to grab hold of the grip.
Or am I looking at this wrong? My point is, you say you'll be allowed to carry concealed at work now. An IWB holster is not going to fully conceal the handgun.
Here's a DeSantis IWB holster for an example. There's definitely gonna be some gun showing above the waistline.