Numerous competition successes quickly paved the way for an international career for German soprano Ruth Ziesak. Meanwhile she has also been appointed a Professor of Singing at the Saar Academy of Music.
After early appearances at the Theater Heidelberg and the Deutsche Oper am Rhein Düsseldorf/Duisburg, she went on to sing on the international stages in Munich, Milan, Berlin, Florence, Vienna, Paris, London and New York, where she made a name for himself in her signature roles of as Pamina, Ännchen, Marzelline, Ilia and Sophie. She has since broadened her repertoire, and has appeared as the Countess in Le Nozze di Figaro in Glyndebourne and Zürich, and in 2010 at the Stuttgart Opera under Manfred Honeck.
The multifaceted artist is also much in demand as a concert singer, and enjoys working with such Baroque orchestras as the Akademie für Alte Musik Berlin or the Freiburger Barockorchester. She makes frequent guest appearances at the Salzburg Festival and the Lucerne Festival. Her work with conductors such as Herbert Blomstedt, Daniele Gatti, Riccardo Muti, Kent Nagano, Lothar Zagrosek, Riccardo Chailly, Jukka Pekka Saraste and Ivor Bolton has taken her to the Gewandhausorchester Leipzig, the Staatskapelle Dresden, the Bavarian Radio Symphony Orchestra, the WDR Symphony Orchestra, the Konzerthausorchester Berlin, the Montreal Symphony Orchestra and the Mozarteum-Orchester in Salzburg.
As a lieder singer she is regularly accompanied by the pianist Gerold Huber, with whom she appeared in Vienna, Berlin, London, at the Heidelberger Frühling and the Kissinger Sommer. Ruth Ziesak is among Sir András Schiff's regular lieder partners. They appeared together at London's Wigmore Hall, at the Salzburg Festival and at the Philharmonie in Berlin. In the field of chamber music, she works together with the Merel Quartet, the Vienna Piano Trio, the Auryn Quartet and the Trio Wanderer.
Alongside her concert recordings with Sir Georg Solti, Riccardo Chailly and Herbert Blomstedt, Ruth Ziesak has recorded The Magic Flute, Fidelio, La Clemenza di Tito, Der Freischütz, Hansel and Gretel and Robert Schumann's Genoveva with the Chamber Orchestra of Europe. Among her solo recordings are operatic arias with the Deutsches Symphonie-Orchester Berlin under Marcus Creed and lieder by Mahler, as well as a series of lieder recitals with Ulrich Eisenlohr.