First off, you will need to investigate how that company screens and evaluates the potential officers for your site. Depending on your state, background and criminal checks may vary so you want to ensure the security vendor is doing a very thorough check, whether mandated or not.
Another great sign of a security provider is that they pay for the background checks and licensing. It’s one of the most important steps in hiring quality security guards, and the company should be committed to thoroughly screening all applicants and not putting that cost against the applicants. It’s a surefire way to identify if quality is important to them.
When it comes to hiring standards, find out the types of experience and length of service required. If the answers are vague or generic, they may be hiring underqualified people who won’t understand how to protect your business specifically.