Recruiter interview then 2 or 3 typical one-on-one interviews, then a panel interview, then a case study, role-play, panel interview. Open and fair process. Told me exactly what their concerns were regarding my background and experience and allowed me to address those concerns. Probably the best process I have ever been through. By the time I was hired I was very confident that both I and the Gartner were knew what we were getting and were happy about it.