While Sorcerer was in production, Charles Bludhorn was chairman of Gulf & Western, the parent company of Paramount. G&W, thanks to Bludhorn, had extensive interests in the Dominican Republic.
Walon Green: “[Friedkin] put Bludhorn’s picture on the wall in the office in the scene where [the oil company foreman] finds out that the well is blown by terrorists and they can’t do anything about it. When Bludhorn saw his picture on the wall as chairman of the oil company he had a shit hemorrhage!”
From Hurricane Billy: The Stormy Life And Times Of William Friedkin by Nat Segaloff.

this actor played a part in paths of glory
Yes indeed — Peter Capell.