I'm surprised no-one has yet mentioned BAF and/or the Keegans.
Perhaps the problem is that it's difficult to do so without resorting to the kind of language that Mike Keegan used all the time.
That aside, they are an integral part of the story, and played an important role at SEN for a long time.
But it was still by a wide margin the worst company, at management level at least, that I ever came across in my aviation career.
Notwithstanding that, I did learn some of the tricks of running an operation outside the law, including paying the FOI handsomely to look the other way from unsafe and illegal operating practices, for which I am duly grateful.