I was brought in three times, had 4 different interviewers come in and out of the room I was in asking questions. Then received a call 2 weeks later that I did not get the position.

Very standard. The first interview was om the phone asking a few behavioral questions. Then the in-person questions were more directed about the program. They tend to have positions opened frequently so it doesn't hurt to be proactive but id start looking a month before graduation.