many security guards are ex cops, when I was in the biz I met lots of folks, some good some bad...like anywhere else.
As a San Francisco armed security guard I found that 99% of cops and management clueless when it came to the law in regards to armed security.
I had a high ranking SFPD tell me I couldn't open carry to work, I replied I'll be glad to stop when you issue
me a ccw...he frowned and said"...oh...uhhhh...well...ok"
Management said gold dot only, no fed hydrashok also no .45, when asked why they told me
"the hole in the front of the gun is to big" also we were not allowed (per mgnt) to carry pepper spray or batons but were required to have certs for both.
The qualification course for armed guards at Jackson Arms in South SF is very good and the instructor Brian is a former federal LE and trains fed's as well....
Reeds range also gives a very intensive, informed course.
Some of the guys I used to work with were vets who spent a lot of time shooting at people who were shooting at them in Iraq.