Advantage security is a great stepping stone for a security career. However, if you are looking for a move to a different security company, I would not recommend. The management has poor communication between executives and employees. If you have any life crises what so ever, you have a better chance digging oil and striking it big, then finding coverage so you can attend to what is happening in your life. And if you leave, because that life crisis is that important, and there is no one to cover, you will lose your job. The pay is mediocre at best, and it differs per site you are at. There are virtually no incentives to keep you motivated to even stay within the company, and there are no raises. There is also a huge lack of moving up. If you are an ambitious person, and you feel like you can become something and go places, do not join advantage for the long haul.
The employees that you work directly with, are the enjoyable part of this job. However, Advantage is just like any mainstream corporation that could care less about their underdog employees and just pull strings like you're a puppet.