While the average American citizen might make the assumption that CPR and first aid basics are only required in emergency services positions, the truth is that understanding these techniques are extremely important in any line of work.
The mode of carry is going to be a comfort issue if you hike any distance. I have hunted for many years and had many friends carry side-arms in holsters that work fine while sitting in the car, at the desk or walking around the mall.  However, they have been extremely unhappy and uncomfortable after getting four or five miles back into rough country in the heat, cold or whatever.
“What does that mean for me and how can I make more money as a security guard?”  The answer is simple and has three parts: experience, training and focus.  Let's take them one at a time.
On the morning of April 4, 2011, a Chula Vista Mall Security Guard stationed in the Apple Store at the Otay Ranch Towne Center mall in Chula Vista California, was forced to shoot one of three armed burglary suspects as they broke into the business. That afternoon, NBC 7/39 interviewed Practical Defense Systems Co-founder, regarding Security Officer training.
California State Senator Joel Anderson, on April 13, 2011, presented Practical Defense Systems with a California Senator Certificate recognizing the "Outstanding training... and excellent public-safety and self-defense courses..." provided by PDS to residents of San Diego's East County.