Considered to be both one of the greatest - and most paranoid - spymasters in living memory, CIA Counterintelligence Chief James Jesus Angleton was undeniably one of the best in the field. By the ’70s, however, he was also considered too toxic for government service after revelations, scandals, and Agency politics forced him and other senior staff out. While it’s been known that he remained somewhat active as an advisor and in think tanks, it seems that little is known beyond his involvement with the American Security Council think tank and a few similar organizations. A formerly SECRET memo from CIA, however, establishes that they, and others, consulted with him on an official basis.
https://www.muckrock.com/news/archives/2017/feb/21/even-mandatory-retirement-couldnt-stop-spymaster-j/