Imandt went to Indonesia in 1908, where he lived and worked as a painter and drawing teacher at secondary schools. He traveled all over the archipelago, and participated in several exhibitions organized by the Bataviasche Kunstkring in Jakarta from 1920 to 1925. After a stay in The Netherlands from 1928 to 1935 he returned to Indonesia. During World War II he was interned and put in a camp by the Japanese. Around 1946 he returned to The Netherlands, where he settled in The Hague.