 He was conscripted into the Latvian Legion in 1943 or 1944, and later sent by the German Army to work as a military geologist in Italy and Germany.After the war Dreimanis was appointed Associate Professor in the Baltic University in the Displaced Persons camps at Hamburg and Pinneberg in Germany.In 1948, Dreimanis immigrated to Canada to assume a lecturer position at the University of Western Ontario in London, Ontario.