There, he performed Count Almaviva, Don Giovanni, Leporello, Guglielmo, Papageno in Mozart's operas, Figaro in Rossini's Il barbiere di Siviglia, Dandini in La Cenerentola, Raimbaud in Le comte Ory, Marcello in Puccini's La Bohème and Nekrotzar in György Ligeti's Le Grand Macabre.
[3] Achrainer has sung under renowned conductors such as Dietfried Bernet, Christoph Campestrini, Dennis Russell Davies, James Gaffigan, Kurt Masur, Marc Minkowski, Thomas Rösner, Reinhard Schwarz, Ralf Weikert.
Composers such as Alexander Bălănescu, Rudolf Kelterborn, Kurt Schwertsik, Paul Engel, Ernst Ludwig Leitner and Ingo Ingensand have written for him.
He worked with directors such as Brigitte Fassbaender, Isabella Gregor, Harry Kupfer, David Pountney, Olivier Tambosi and Jochen Ulrich.
Achrainer can be heard on numerous international CD and DVD releases, radio and television recordings document the versatility of his musical work.