From 1973 - 1977 he served as Head of the U.S. Department of Transportation 's Federal Highway Administration .
Tiemann was on the National Governors ' Conference Executive Committee from 1968 to 1969 .
From 1973 - 1977 Tiemann served as Head of the U.S. Department of Transportation 's Federal Highway Administration .
Tiemann was on the National Governors ' Conference Executive Committee from 1968 to 1969 .