There were 2 steps: phone interview and all day on-site interview. Phone interview was brief, they need to know if you can troubleshoot and if you can work in a team environment to help customers. The on-site interview is all day, meeting with all the members of the specific tech support group and management.

Phone screen with hiring manager took about 30-45 min. Was called back for an on site interview the following week. On site interview took about 2 hours, met with hiring manager (from phone screen), manager from an adjacent dept, and a woman from HR. Hiring manager asked me many questions regarding statistical analysis. He also asked what I wanted to do "when I grow up," which seemed somewhat condescending. The other manager was very friendly and spoke as if I had already gotten the job. The woman from HR was friendly enough, but appeared doubtful about my potential employment. Overall, it was an average experience as far as interviewing went. I was, however, disappointed in the lack of professionalism they showed following the interview. I was told I would hear back by the end of the following week and did not. I followed up with a voicemail and email, and did not receive a response. I don't think a short email back is too much to ask considering the amount of time they (and I) spent discussing this position.