Continental Secret Service Bureau – “Overall a decent job, major communication issues.”

Pros

Good compensation for guards, all dependent on site.
Typically you can easily pick up a shift if desired, as well as getting time off is usually easy, within reason.
Most coworkers are easy-going.
Most sites are not very intense (you don't get a lot of action), which makes for a pretty easy day at work. Though some sites are known for trouble.

Cons

Communication from your supervisor from changes at your site is terrible. You will work a shift trusting you've done everything right, come in the next morning, and find that you did something wrong that nobody informed you had changed. At certain cites, management doesn't take the time to clearly spell out and document your responsibilities and notify you of changes, resulting in headaches.
You have to pay for your uniform and equipment as a form of deposit that is reimbursed when you discontinue employment. (Around $200)
Initial employment requires a drug test that they make you take at a hospital, usually resulting in 3-4 hours of your day wasted just to pee in a cup. I wonder if they know of swab tests...

Advice to Senior Management

Improve the way management/supervisors communicate changes with their guards, and regular duties are clearly spelled out so new guards have some sort of reference. Develop relationships that are based on trust and integrity. I want to work for someone who listens to my concerns and gives clear answers.