C. Thomas Cori, Ph.D.
Retired Chairman, Sigma-Aldrich
Retired Chairman, Sigma-AldrichRetired chairman of Sigma-Aldrich Named vice president of Sigma-Aldrich in 1975 with merger of Sigma Chemical and the Aldrich companies; served as president from 1980-95; elected CEO in 1983 and served as chairman of the board from 1991 to December 31, 2000.