I assume the bandanna would be signal orange, and the FAK has basic items like pain reliever

Couple of ideas
-Bottled water or emergency water pouches (maybe too big, if not don't worry)
-Space Blanket
-Maybe add a cell phone hand crank recharger and/or signal booster. In a "trapped in rubble" type emergency (earthquake, attack), being able to talk and not run out of batteries is a good thing.
-Waterless clensing wipes (for face) and waterless hand sanitizer would be good too.
-An ASP palm defender (or some other pepper spray) and some decontamination wipes would also be nice for everyone in the office to have.

Just some ideas. It really depends on your situation and expected threats. A business person who travels often might find some things useful that wouldn't help, say, an officer worker. For instance, a 110/220v converter. On the other hand, an office worker might face anything from getting trapped in rubble to getting confronted in the parking lot by some undesirables. A business person

Any sort of multi-tool, even the little mini ones, would also be useful, although as you mentioned, it might get you hassled at some place with a metal detector