You have to get onto base first and that's it's own mission. Just tell the gate guards that you're there for an interview and then they'll have to redirect you to the police station to get a visitor pass. Your car may or may not randomly searched. From there you have to find on the map where you're being interviewed. From there, you will most likely be escorted. Since I was applying for a Lab Assistant job, I had to meet the lab I was going to work for. I met the biologists then the supervisor and the PO. I was interviewed by the group biologists in their office in a group setting (3:1). The supervisor and PO were 1:1.