Marcel Brunner comes from Bad Mergentheim in the south of Germany.
The young bass-baritone studied singing with Snezana Stamenkovic and Christiane Libor at the Conservatories in Mannheim and Karlsruhe.
Masterclasses with Julia Varady, Michelle Breedt, Markus Eiche, Burkhard Kehring, Rudolf Piernay and Hartmut Höll completed his training.

Already during his studies, Marcel Brunner made his debut at the Nationaltheater Mannheim in 2013 and was engaged there as a guest in various productions.

He made his debut at the Berlin Philharmonic's Easter Festival in Baden-Baden in March 2018 as Klingsor in a children's version of Wagner's Parsifal and also made a guest appearance with this production in the Great Hall of the Berlin Philharmonic.

From 2018 to 2020 Marcel Brunner was a member of the opera studio of the Nationaltheater Mannheim.
His roles included Masetto in Don Giovanni, Hermann Ortel in Die Meistersinger von Nürnberg, Leander in Die Liebe zu drei Orangen, Sagrestano in Tosca, Hobson in Peter Grimes and Polizeikommissar in Der Rosenkavalier.

Since the beginning of the 2020/2021 season, Marcel Brunner has been part of the permanent ensemble of the Nationaltheater Mannheim. There he can be seen in new productions as Papageno in The Magic Flute, Bonzo in Madama Butterfly, Stimme in Jakob Lenz and as the Hauptmann in Simplicius Simplicissimus, among others.

In the 2021/2022 season, guest contracts will take him to the Stadttheater Klagenfurt as Stimme in Jakob Lenz, to the Leipzig Opera as the Mesner in Tosca and to the Theater Bonn as Un Frate in Don Carlo.

Marcel Brunner is a sought-after soloist in concert and oratorio and performs with orchestras such as the Württembergische Philharmonie Reutlingen, the Württembergische Kammerorchester Heilbronn, the Deutsche Radio Philharmonie Saarbrücken Kaiserslautern, the Kurpfälzische Kammerorchester Mannheim and the Beethoven Academy Orchestra Krakow.

He has worked with renowned conductors such as Lukasz Borowicz, Christoph Gedschold, Roberto Rizzi Brignoli, Tung-Chieh Chang, Johannes Kalitzke, Hans-Christoph Rademann, Case Scaglione, Ola Rudner and Alexander Soddy.

Marcel Brunner has also appeared as soloist in various radio productions for SWR and Deutschlandfunk.