Joined IBM as a senior PM. Started with a lot of promise and enthusiasm, but found within a few weeks that there was no clear planning around the role, and poor integration into the existing management structure. Existing management were protective of their own reputations, and reluctant to trust or accept my input.
Loss of confidence and lack of trust became unworkable, and right on the verge of resigning in disgust, I was let go, 5 months in. Still wondering why they ever hired me!
Best advice I can give, if you really want to work here, is to interview your hiring managers very carefully, to ensure you are really needed, and a good fit. The culture was unlike anything else I'd experienced in 33+ years of successful and productive work.
Working for a global brand
Old-school micromanagement and distrustful culture