Very informal. I was contacted by the staffing division after applying on line 3 months prior and asked was I still interested. I was then brought in to interview with one staffing assistant. She basically went over my resume and asked me questions directly related to the information I supplied. She questioned my salary demands and agreed with me but also stated that she wouldn't have final say. She then escorted me to the Law Enforcement Unit where I was interviewed by a ranking officer. He basically filled me in on the job duties and informed me that someone would contact me with an offer soon. A few days later, I received an offer. It was not what I asked for, but wasn't far off. I accepted.