;Choirmaster 1990 to 2008 and 2011 to present: choirmaster of the chamber choir Collegium Vocale Innsbruck. 1991 to present: permanent choirmaster of the vocal ensemble Vocapella Innsbruck. 2012 to present: choirmaster of Chor der Vielfalt (choir of diversity), an amateur choir in Innsbruck committed to cultural integration and diversity. 2015: Sieberer establishes the "Innsbrucker Jugendchor" (youth choir of Innsbruck, JUKO) for which he also functions as choirmaster. ;Theatre In 1992 he was in charge of staging and rehearsal of the theatre music for the "Volksschauspiele
Telfs". From 1995 to 2001 he conducted Werner Pirchner's incidental music for
Hugo von Hoffmannsthal's
Jedermann at the
Salzburg Festival. In 1997 he conducted the world premiere of
Werner Pirchner's
Shalom – Choräle für Streichorchester at the festival "Steirischer Herbst". In 2013 he acted as musical director of the "Passionsspiele Erl". ;Conducting In 1990 he made his conducting debut with the
Vienna Chamber Orchestra at the
Konzerthaus Vienna and the
Brucknerhaus in
Linz. Since then he has worked with a number of international choirs and orchestras and performed at Steirischer Herbst, Salzburg Festival, Slovakian Philharmonics,
Innsbruck Festival of Early Music and Tiroler Feststpiele Erl. Many of his performances have been recorded on CD or have been broadcast on national and international radio and television. This includes two recordings of contemporary Tyrolean music: the CD „strings“, a complete collection of music for strings by Werner Pirchner, and the CD „Totentanz“, featuring music by
Maria Hofer. An ongoing collaboration with the Slovakian chamber orchestra
Capella Istropolitana has produced a number of recordings which have been published under the title "...im Gespräch" ("... in conversation"). These feature a conscious engagement with the deconstruction of, reflection on and performance of a number of well known musical works. The aim of this engagement is to cultivate a more in-depth understanding and more nuanced listening of these often-played pieces. Such recordings of works by
Mozart and
Beethoven have already been released, and work is on going on pieces by
Haydn,
Schubert,
Mendelssohn, as well as a selection of 20th-century music. ;Repertoire Bernhard Sieberer has a broad repertoire: it includes choral works from the
Renaissance up until the 21st century and orchestral pieces by a variety of composers, ranging from
Bach to
Bruckner, from Mozart to
Mahler, from Beethoven to
Britten, and from
Purcell to Pirchner. A main focus has been orchestral choir music by
Monteverdi and
Schütz. Sieberer regularly conducts works by
Handel, Bach, Haydn, Mendelssohn and
Brahms, as well as Bruckner,
Orff and
Honegger, and also contemporary music. ==Selected works==