Dr. Hans Mark served as NASA Deputy Administrator from July 10, 1981, to September 1, 1984. 
Prior to becoming Deputy Administrator Dr. Mark served as Secretary of the Air Force from July 1979 until February 1981, and as Under Secretary of the Air Force from 1977. In 1969 Dr. Mark assumed the position of Director of NASA's Ames Research Center. After leaving NASA in 1984 he became Chancellor of the University of Texas system, a post he held until 1992. In July 1998, Dr. Mark became the Director of Defense Research and Engineering at the Pentagon. In January 2001 Dr. Mark returned to the Department of Aerospace Engineering and Engineering Mechanics University of Texas-Austin.
NASA
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