What kind of demand is there for the Open Carry Permit?
They offer a dual-purpose course which is Basic Pistol/Omaha Open Carry Permit. It includes both handgun newbies and (as you suggested) uniformed security guards who need to open carry a handgun in the City of Omaha. Such as armored car personnel, lobby security staff, bank employees, and other security-type employees. Including perhaps the non-uniformed, handgun-holstered open-carrying man who walked into the bank with me the other day carrying a satchel-sized sack.
Classes are held about once/month. Range qualification is a requirement. The class is very similar to the NE CHP class, both in format and length.
And Mudinyeri is quite correct: NO HANDGUNS in the NSC building. Posted conspicuously (sorta).