Bud W. Wendorf
2013 - 2018
John W. Rowe
2006–2013
Robert A. Pritzker
1990–2006
Robert W. Galvin
1979–1990
Maynard P. Venema
1971–1979
Harris Perlstein
1967–1971
Lester Armour
1961–1967
James D. Cunningham
1940–1961