I had one on-site interview at a career fair. This interview was purely behavioral questions, as the interviewer was a recruiter (business degree), not in the engineering department. Had a follow-up interview that was a skype conference interview where I interviewed with 3-4 engineers from the design team in Boulder. This was a mix of technical and behavioral questions, split about evenly. It is my understanding that for full time positions, candidates must also go through an on-site interview in Boulder after passing the teleconference interviews. I did not get an offer, but Plexus was courteous to contact me in a timely manner (about two weeks I think) and tell me they were pursuing other candidates.

Step 1: 15 min phone screening interview w/ Plexus recruiter Step 2: 30-60 min phone technical interview with senior engineer Step 3: All day interview at Plexus facility. Was given a tour, one on one session with HR, gave a 30 min presentation to the engineering team, broke into 3 technical sessions with different engineers, and then was interviewed by both direct and second level management in separate one on one sessions. Everyone was very nice and seemed like an interesting place to work. The process seemed like overkill for an entry level position, and it is asking a lot to expect candidates to use a vacation day at their current job to interview, but it is nice that they care enough to go into the detail. Overall left with a good impression of the company.