After he completed his secondary studies, von Unger studied mechanical engineering at the
University of Hanover from 1951 to 1957. After graduation, he worked for . He served as director general of a subsidiary from 1980 to 1992 and subsequently became an independent consultant. In 1963, von Unger joined the
Christian Democratic Union of Germany (CDU) and served as a Municipal Councilor for
Duisburg from 1979 to 1990. From 1980 to 1995, he was a member of the
Landtag of North Rhine-Westphalia for the CDU. Hans-Karl von Unger died on 17 April 2021 at the age of 90. ==Distinctions==