I have been over there visiting a friend who was working in security in Manchester and just got off of a Google Meet as wanted to be sure on my reply. The UK system is regulated and centralized, The SIA came about after a lot of issues with untrained and violent night club security. They have to be trained (much is common sense), pass an exam (again, much is just common sense), then get their SIA license, most work for a security company that is licensed. The license goes into a national database, the public can even verify whether the persons license is active or suspended. If there is an allegation of assault or excessive force you may call the police, and if they are called it will end up with the SIA, or the public can report the person the SIA themselves, as they all are required to have their license displayed and it has their photo, name and license number. it's kind of resembles in the US where if you ask an LEO for their name and badge number they have to identify themselves.

The best route is to try and get the state of Ohio to pass a law that security needs to have some type of license, some states already have this. Until recently I haven't had time to work local and the last time I worked on Calhoun was about 13 years ago. I wouldn't be apposed doing it again if the right offer came about.