Laboratory Directors

Directors of Oak Ridge National Laboratory (originally named Clinton Laboratories) include the individuals pictured below.

Martin D. Whitaker Director Clinton Laboratories 1943-1945
James H. Lum Executive Director Clinton Laboratories 1946-1947
Dr. Eugene P. Wigner Research and Development Director Clinton Laboratories 1946-1947
C. Nelson Rucker Acting Director and Executive Director ORNL 1948-1950
Dr. Clarence E. Larson Director ORNL 1950-1955
Dr. Alvin M. Weinberg Director ORNL 1955-1973
Floyd L. Culler Acting Director ORNL 1973-1974
Dr. Herman Postma Director ORNL 1974-1988
Dr. Alex Zucker Acting Director ORNL 1988-1989
Dr. Alvin W. Trivelpiece Director ORNL 1989-2000
Dr. William Madia Director ORNL 2000-2003
Dr. Jeff Wadsworth Director ORNL 2003-2007
Dr. Thom Mason Director ORNL 2007-Present