The young German countertenor lives in Berlin, grew up in Lippstadt, Germany, and had his first lessons as a countertenor with Heike Hallaschka in Muenster. Since 2010, he has undertaken voice training with Renate Faltin (Hanns Eisler Musikhochschule, Berlin), and, since 2016, has had additional lessons with Annette Goeres (Berlin). He also received valuable inputs to his training from Ingeborg Danz, Kai Wessel and Barbara Schlick (Cologne), Antonio Lemmo (Rome), Nicholas Clapton and Dame Emma Kirkby (London). He was a scholar of the Studienstiftung des Deutschen Volkes, the College of Music and Dance in Cologne, and the College of Music in Detmold.
During his studies, Mathmann was awarded the German National Prize Jugend Musiziert, and at the 2011 Giulio Perotti Singing Competition was honoured with not only a first prize, but an ‘extraordinary recognition’ for the best performance in the field of concert and oratorio.
Mathmann performs regularly at international European festivals such as Winter in Schwetzingen; Bremer Musikfest; Festival Oude Muziek in Utrecht; MAfestival in Bruges, Festival della valle d’itria in Martina Franca (2017), International Händelfestspiele in Göttingen (2017) and Ludwigsburger Schlossfestspiele (2018). He sang concerts at venues like the Tonhalle Concert Hall in Dusseldorf, at Frankfurt Opera, TivoliVredenburg in Utrecht, etc.
In 2011, Mathmann made his opera debut at the Château Sanssouci in Potsdam. Since, he has continued to enjoy leading opera roles, for example, he performed at the Opera of Heidelberg, the Opera of Winterthur (2017), at the Tage der Alten Musik of the Westdeutscher Rundfunk (WDR; in 2016). In 2017 he made his debut as a recording artist, performing in the world premiere recording of F. X. Richter’s oratorio La deposizione della croce di Gesu Cristo with the Czech Ensemble Baroque. In 2018, he gave his debut in Russia singing the main role La Bellezza in a fully staged production of Il Trionfo del Tempo at the Stanislavsky Theatre in Moscow. He was the first countertenor ever to perform this soprano role.
Mathmann has participated in many productions for broadcast, working with organisations including Hessischer Rundfunk, WDR, and Dutch Classical Radio (NPO Radio 4) together with great musicians and conductors such as Philipp Chizhevskiy, Dorothee Oberlinger or Diego Fasolis.