I've been looking around WSO for a while now but haven't gotten around to posting anything substantial/giving back. I'm doing an AMA for the next two weeks give or take to answer questions/thoughts you might have. Hopefully I can help despite my limited background, given the seeming lack of information on big 4 diligence groups. Maybe this will help someone decide that this is the career for them.
Going on a few years now I have been working in a transaction advisory services group at one of the big four professional services firms in New York.
The work varies significantly from one big 4 to the next (i.e. EY vs. DT vs. PwC vs. KPMG), and even moreso when looking at regional firms, so i'll stick to answering specific questions and areas of interest rather than giving a background at length.
I won't be answering some questions due to the nature of the work (M&A), firm policies/restrictions, and personal reasons. That leaves plenty to be discussed though, so ask away.