M.G. Van Buskirk - 1927-29

Ernest D. Lawrence - 1929-31

Fred E. Herndon - 1931-59

Melvin E. Sims - 1959-80

O. Glenn Webb - 1980-2000

Daniel Kelley - 2000-present

George R. Wicker - 1927-29

Lloyd R. Marchant - 1929-41

C.H. Becker - 1941-68

E.V. Stevenson - 1968-82

Kenneth P. Baer - 1982-87

Norman T. Jones - 1987-98

D. William Davisson - 1998-2010

Jeffrey Solberg - 2011-present