Born in Eschenhausen, Lower Saxony, Schirmer studied at the Bremen Conservatory, and also at the Hochschule für Musik und Theater Hamburg, with György Ligeti, Christoph von Dohnányi and Horst Stein. He worked as an assistant to Lorin Maazel and conducted at the Wiener Staatsoper productions of Luciano Berio's Un re in ascolto, Arnold Schoenberg's Erwartung, and Alexander Glazunov's Raymonda. (Wikipedia)
