Siegmund Nimsgern (born 14 January 1940) is a German bass-baritone, born in Sankt Wendel, Saarland, Germany. After leaving school in 1960 he studied singing and musical education at the Hochschule für Musik Saar with Sibylle Fuchs, Jakob Stämpfli and Paul Lohmann. He made his debut at the Saarländisches Staatstheater in Saarbrücken in 1967. In 1971, he went to the Deutsche Oper am Rhein in Düsseldorf and Duisburg. From there he began his international career as an opera singer. He lives with his family in Sankt Ingbert, Saarland, Germany. His son is the musical theatre composer Frank Nimsgern.