I was referred by a friend (who was a Manager) who submitted my resume. I was contacted by an HR leader who held the first screening over the phone. Within a day, I was told that they are interested in me coming in for a series of office interviews, which would take about 3 hours. The first interview was with a managing director who mostly read my resume and said that my skills were mostly what they needed. The second interview was with a director who asked more difficult questions related to my audit experience. The third interview was with a senior partner who asked softball questions. The fourth interview was with an HR staffer who asked standard recruiting questions and confirmed my previous employers. After a week, I was asked to perform a security screening over the phone with PwC's security director. The next day I was offered the job.