Since then Ruth Ziesak has herself been appointed a professor of singing at the Saar University of Music.

After debuted at the operas houses in Heidelberg and Düsseldorf/Duisburg, her career led her from the stages of Munich, Stuttgart, Berlin and Dresden to the international platforms of Milan, Florence, Vienna, Paris, London and New York, where she shone in her signature roles of Pamina, Ännchen, Marzelline, Ilia and Sophie. In the meantime, she has extended her repertoire with the role of the Countess (Glyndebourne and Zurich).

The multifaceted artist is a much sought-after concert soloist and works with the leading orchestras in Paris, Milan, Vienna, Munich, Leipzig, Amsterdam and London, and also with the ‘Akademie für Alte Musik Berlin’ and the Freiburger Barockorchester. She is a frequent guest at various festivals: Salzburg, Lucerne, Schleswig-Holstein, and the BBC Proms). Singing under the baton of conductors such as Herbert Blomstedt, Daniele Gatti, Riccardo Muti, Kent Nagano, Lothar Zagrosek, Riccardo Chailly, Jukka Pekka Saraste and Ivor Bolton, she has performed with the Gewandhausorchester Leipzig, the Staatskapelle Dresden, the Bavarian Radio Symphony Orchestra, the WDR Symphony Orchestra, the Konzerthausorchester Berlin, the Montreal Symphony Orchestra and also Salzburg’s Mozarteum Orchestra.

As a lieder singer Ruth Ziesak is regularly accompanied by Gerold Huber, with whom she performs in Vienna and Berlin and at London Wigmore Hall, at Austria’s Liszt Festival, at the festivals ‘Kissinger Sommer’ or ‘Heidelberger Frühling’, to name just a few. They had been invited to perform at two lieder recitals by the Leipzig Gewandhaus, where she performed newly discovered lieder by Felix Mendelssohn-Bartholdy. Ruth Ziesak counts among Andras Schiff’s regular lieder partners with concerts so far at London’s Wigmore Hall or Essen Philharmonie. She works with the Merel Quartet, the Nash Ensemble and the Vienna Piano Trio on the chamber music podium.

Ruth Ziesak has participated in quite a few CD recordings with Georg Solti, Riccardo Chailly, Herbert Blomstedt, Christoph von Dohnànyi, Nikolaus Harnoncourt, Marek Janowski, Donald Runnicles, Marcus Creed and Daniele Gatti among others; also she released two Lieder recitals together with Gerold Huber: Joseph Haydn and Franz Liszt.