There are a lot of very aggressive and rude project managers.
They will treat you as a slaver not coworker.
You must talk the responsible engineers directly if you need information or data, MUST NOT use only Email.
They don't reply your Email and the project managers complain VERY HARDLY to you about why you don't meet face to face. The project managers will not complain the responsible engineers if they are more powerful.
This culture is very bad, slow and not easy to work.
MUST write down the meeting result by document file and sharing each other not talking, because they will say that they could not remember about your mention.
I can understand why the good engineers are leaving this company.