Education and stage work From 2013 to 2015, Kammerer was part of the
Youth Ensemble of Maresa Hörbiger.
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. 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. At the
Kasino am Schwarzenbergplatz in October 2020, he played in
Hans Christian Andersen's ''
The Emperor's New Clothes'' as the emperor's
footman. In January 2023, Kammerer premiered at the Burgtheater as Hans Castorp in a dramatic adaptation of
Thomas Mann's
The Magic Mountain.
All Quiet on the Western Front 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 cast for the role of Bäumer when Kammerer was identified by Sabrina Zwach, wife of the film’s producer,
Malte Grunert. Grunert was so impressed by Kammerer’s performance at the Burgtheater he offered him an immediate audition and gave a personal recommendation to Berger. Berger described seeing Kammerer’s face the first time and being struck by the fact he "was already so old-fashioned and so classic looking, so pure and so innocent". They continued to cast for four to five months and Berger said: Kammerer's performance in
All Quiet on the Western Front has been widely praised. Maggie Lovitt for
Collider wrote "In his first performance on-screen, Kammerer proves himself as a promising newcomer on the global stage. Paul Bäumer is not an easy role to take on; the physicality of the role alone might crush a performer, and that's without considering the great emotional toll undertaken to portray the shame, depravity, and agony of war. Paul is the heart of the film, and Kammerer effortlessly bares his soul to the audience as the war takes and takes and takes from his character." John Nugent of
Empire (magazine) described his performance as "hugely impactful even when caked in mud". Danny Leigh in
The Financial Times describes him as a "remarkable newcomer", with Kate Connolly in
The Guardian describing how "Bäumer is tenderly and brilliantly played by newcomer Felix Kammerer". Justin Chang for
IGN says "Kammerer may be a newcomer, but his performance is nuanced and chilling in equal measures. Bäumer isn't just out of his depth – each and every moment of life on the front lines leaves him desperately trying to catch his breath. Kammerer captures every moment with an agonizing depth that he wears on his sleeve throughout. This truly incredible performance highlights the horror of a young soldier forced to confront every nightmare imaginable. Bäumer is under the lens, as every moment pushes him further away from the young man he was."
2023—present In 2023, he was cast in
Ron Howard survivalist film
Eden alongside
Sydney Sweeney and
Daniel Brühl. He appeared in the 2025
Guillermo del Toro re-telling of the
Frankenstein story. ==Awards==