A total of six interviews following an initial telephone screening interview. Two sets of three interviews each on site about 2 weeks apart. I really had some excellent interaction with all of the interviewers and HR representative. I followed up thanking the interviewers and to hopefully find out the application status and heard nothing for almost 3 months when I received an out-of-the-blue "are you still interested in this job inquiry". Alas, I had already accepted another offer by then.