[2] His acting ability was described as "well-supplied with vivid imaginative touches, whether deployed in comic roles or characters of inexorable malevolence.

[4] At the Vienna State Opera, he appeared as the Komtur (Commendatore) in Mozart's Don Giovanni, as Pizarro, as La Roche in Capriccio by Richard Strauss and as Jochanaan in Salome, among others.

[4][8] He sang the roles of Alberich and Gunther in Der Ring des Nibelungen, Biterolf in Tannhäuser, Marke in Tristan und Isolde, and finally Klingsor in Parsifal.

On 24 February 1979, he appeared in the double role of Dr. Schön and Jack the Ripper in the world premiere of the completed version of Alban Berg's Lulu at the Paris Opera, conducted by Pierre Boulez and directed by Patrice Chéreau.

[9] He also performed roles such as Scarpia in Puccini's Tosca, the Doctor in Berg's Wozzeck, and in Viktor Ullmann's Der Kaiser von Atlantis.

[14] He performed as Gurnemanz and Pizarro in 1983, as Count Waldner in Arabella by Richard Strauss in 1984, alongside Kiri Te Kanawa in the title role and conducted by Marek Janowski, and as the Doctor in Wozzeck in 1995.

[14] After repeating Lulu and Parsifal, he was Frank in a new production of Die Fledermaus by Johann Strauss in 1986, and Mr. Flint in Britten's Billy Budd in 1989.

[14] Mazura appeared in 2006 in the narrating role of Charon in Henze's Das Floß der Medusa, which was performed for the composer's 80th birthday at the Berliner Philharmonie, conducted by Simon Rattle, and with Christian Gerhaher as Jean-Charles and Camilla Nylund as La Mort.

[16] In April 2019, he performed as Meister Hans Schwarz in Wagner's Die Meistersinger von Nürnberg at the Staatsoper Berlin.

[2][6][20] Mazura can be seen on DVD as Gunther in the Jahrhundertring production of Der Ring des Nibelungen, Klingsor in Parsifal, Biterolf in Tannhäuser, Prison-Warden Frank in Die Fledermaus, and Doktor Schön in Lulu.