Kaspar Glarner was born in Zurich and studied in Paris. After graduating, he worked there initially as a freelance painter, graphic artist and interior designer until Rolf Glittenberg took him on as an assistant stage designer at the Thalia Theatre Hamburg. He was the assistant to Erich Wonder on several international opera productions. After developing the first works of his own with Markus Imhoof and Hansgünther Heyme, Kaspar Glarner worked with Uwe-Eric Laufenberg at the Théâtre Royal de la Monnaie in Brussels, at the Grand Théâtre de Genève (Tosca), in Oldenburg (Peter Grimes), Marseille (Lucrezia Borgia), Freiburg (Fidelio) and Munich's Residenztheater (Elementarteilchen). At the Frankfurt Opera, he designed, among others, the costumes for productions by Uwe-Eric Laufenberg (Roméo et Juliette) and Keith Warner (Death in Venice, Lear, Volo di notte, Il prigioniero and Falstaff). He also worked with the director Keith Warner on the stage design of Die Frau ohne Schatten at the Hamburg State Opera, Katya Kabanova at the Theater an der Wien, Simon Boccanegra and Tannhäuser in Strasbourg and Die Teufel von Loudon in Copenhagen. He has also worked with directors such as Dale Duesing, Christine Mielitz, Walter Sutcliffe, Vincent Boussard and Johannes Erath.