After working on the Berlin stage, he made his feature film debut by playing the lead role in the war drama All Quiet on the Western Front (2022).
[4][3] Martin Kušej brought Kammerer to Vienna's Burgtheater as a permanent ensemble member at the beginning of the 2019/20 season, where he debuted as Duke of Medina-Sidonia in Schiller's Don Karlos.
In October 2019, Kammerer appeared at the Vienna Academy Theater in a production by Ene-Liis Semper and Tiit Ojasoo as Behemoth in Master and Margarita by Mikhail Bulgakov, and in The Little Witch by Otfried Preußler, which premiered in November 2019 at the Vestibule of the Burgtheater.
[5][6] In February 2020, Kammerer appeared at the Akademietheater alongside Caroline Peters, Christoph Luser, and Martin Wuttke in the world premiere of Elfriede Jelinek's play Schwarzwasser, which deals with, among other things, the Ibiza affair.
[8] In January 2023, Kammerer premiered at the Burgtheater as Hans Castorp in a dramatic adaptation of Thomas Mann's The Magic Mountain.
[9] In 2022, Kammerer made his big-screen debut appearing as Paul Bäumer, the lead role in Edward Berger’s German-language adaptation of the Erich Maria Remarque 1928 novel All Quiet on the Western Front.
Berger was casting for the role of Bäumer when Kammerer was identified by Sabrina Zwach, wife of the film’s producer, Malte Grunert.
[20] In January 2023, it was announced Kammerer was included on the longlist in the best actor category for the 76th British Academy of Film and Television Arts awards for All Quiet on the Western Front.