1941-1949: George H. Mitchell 1950-1952: N.A. Boylen 1953-1956: Fred J. McMahon 1957-1958: Vernon M. Singer 1959-1964: Norman C. Goodhead 1965-1966: James
匹茲堡企鵝 John McEleney(英语:John McEleney) – CEO, SolidWorks Alan McKim(英语:Alan McKim) – CEO and Founder, Clean Harbors(英语:Clean Harbors) Edward McMahon(英语:Edward