Relaxed. and for the most part positive.
There is no culture because they treat you as a brainless slave. But if you want the actual culture environment, its depressing, annoying, and eventually regretful.
Military personnel are offered better pay, better positions, and more advancement opportunities, rather than the experienced every day joe security officer. One thing to remember is that this is a Civialian
Company, providing everyday security for Civilian clients. For some
reason they like to treat and run it as a military organization.
Fast paced - lots to occupy your time and skills.
Great People always willing to help you.