Very brief and I only answered simple questions. Of course I had military experience which they like, and a bit of sales experience before the military. The hiring manager was busy with other work prior to the interview, but he saw me after about 10 minutes or so. I wore a dress shirt, tie, and black slacks to the interview. No blue jeans are allowed. But, one thing of note that I like is that you have permission to have a beard as long as it is neat and trimmed.