I applied through an employee referral. The process took 6 weeks. I interviewed at IBM (Arlington, VA) in Oct 2015
Interview
I was referred by an employee, then maybe a month later contacted for an interview. The interview itself was fairly easy; two 30-min behavioral sections (standard behavioral questions), then one 30-min case interview. The interviews were not conducted by recruiters, so the conversation was fairly casual, and the follow-ups were not meant to be "gotcha" moments. The case study question was, however, strange to me. The position was within the public sector consulting side, and I have an MPA so a good amount of exposure to public sector case studies, but the question was obviously geared towards MBA type applicants.
Interview questions [1]
Question 1
Name a revenue stream of the government you think could be increased, and how.
I applied through university. I interviewed at IBM
Interview
First round - 1 case interview with a Senior Manager. Second round 2 case interviews + behavioral with partners and senior partners. Fairly straightforward process and streamlined once it gets going.
I applied through an employee referral. The process took 1 day. I interviewed at IBM (Armonk, NY)
Interview
Brief screening interview (in person) followed by full-day on-site interview. Interviewed with four consultants who asked a mixture of business, statistics, and brain-teaser type questions. The day culminated with an interview with the section head who did a brief and fairly easy case-style interview.
I applied through an employee referral. I interviewed at IBM
Interview
Had three phone calls screening interview, half an hour each. Slotted on-site interview. Questions include solving business cases (choosing between two business plans), statistics (Bayesian) and data science (clustering and classification).