Let me preface this by saying that I am not leaving this review simply out of spite for not receiving an offer. I understand that McKinsey is notoriously difficult to interview at. However, I have issue with the process itself and the blatant lack of professionalism exhibited by my interviewer. First, I applied for the position in January and received my first contact several weeks later. This is not uncommon for any hiring process so I thought nothing of it--especially for an organization that receives a deluge of resumes regularly. On contact, I scheduled an initial screener that took place the following week. Almost immediately following the phone call I was told that they'd like to speak with me more and run me through a case study interview--but first they'd like to have me talk with a "coach" prior to the interview. My HR contact (who was different from the first one that contacted me) was unable to get a coach to speak with me for two weeks. Upon speaking with the coach, they provided some good advice and wished me luck. Now, it was not the coach's prerogative to schedule the ACTUAL case study interview, but my HR contact. I did not hear back from them for a week. I, myself, had to contact them to see what the hold up was. After several more days waiting to hear back, she contacted me to say that she could not find anyone right now. Finally, an additional two weeks later, I had a phone call scheduled and performed my case interview. Again, this went well and I heard back soon after that I would be interviewing in person at the Chicago office. This contact was made from yet another HR person. Now I had talked to 3 HR people. More time passed with nothing scheduled. After ANOTHER 2 weeks I was told that no one in the Chicago office had time to interview me and a tele-interview would be performed. Setting that up took YET ANOTHER WEEK or so. Keep in mind that I started this process in January and it is now March. Finally the day of my interview and problem solving test. Obviously I was a little nervous considering the implications I heard surrounding passing/failing the PST. When I arrived in the office, my interview was first. They put me in a room with the teleconference computer. It took nearly 15 minutes before they could get it to work properly and I had to fix it myself. So, already 15 minutes have been lost to IT issues. Then came the interviewer. I understand that McKinsey is a busy company, but that does not excuse poor professionalism. My interviewer regularly checked the clock during my interview both while she was talking and while I was talking. As if that wasn't enough, she brought her phone in the room too and would check that while I was giving responses to her questions. The icing on the cake came when I was doing another case and SHE ANSWERED HER PHONE AND TOOK A CALL! I was floored that she'd interrupt my interview for a phone call. This is what the prestigious McKinsey has for employees? Needless to say I was already irked before heading to take my PST (which is a lesson in unrealistic difficulty itself). Please McKinsey--improve your internal processes!