There were only two phases for me. First was a phone call, with basic questions. One star question. Interviewer was very nice and genuine, for the most part we talked about what I thought about the company in general rather than an actual interview. Second round is with two engineers in your potential work group. Again, some nice people. Basic questions, and was tested on power systems background.

First phone interview which asked about my interest and what I knew about the company then heard back for in-person interview two weeks later at Berlin, CT with two experienced engineers. Had to do a presentation before the in-person interview.