Nancy Weißbach is born in Berlin, her first musical education started in her home town, then she studied at the Music College „Franz Liszt“ in Weimar and at the Royal Conservatory in Den Haag with Cristina Deutekom and Diane Forlano. She participated at master classes at the Britten-Pears-School for Advanced Musical Studies, in Aldeburgh with Galina Wischnewskaja, the Scuola Civica in Milan (Rodolfo Celletti), the Gregynog Festival in Great Britain, at the Belgian Plais De Beaux Arts with Vera Roza and at the Belcanto Festival in Dordrecht and the György Festival in Den Haag.
She took part successfully at several voice competitions like „Prix Jeunesse“ in Amsterdam and received a scholar ship at the Belcanto Festival in Milan and the Bayreuth scholar ship from the Richard Wagner organization in Amsterdam.
Her first contracts were for the role of Dido in a production of „Dido and Aeneas“ at the festival d`Ambronay, a role she sang in seven more French theatres, and for Santuzza and Marschallin in „Rosenkavalier“ in Meiningen, since then she has worked as freelance artist.
Important guest contracts include Chrysothemis in an „Elektra“ production of Stéphane Braunschweig in Strasbourg, a role she sang then also at Théâtre Royal de la Monnaie in Brussels with Mo. Kazushi Ono, and in a production of Ruth Berghaus at Nationaltheater in Mannheim, she was heard as Gutrune and 3° Norne at Théâtre du Capitol in Toulouse with Mo. Pinchas Steinberg and the stage direction by Nicolas Joel.
She sang at Opéra Royal de Wallonie in Liège Gutrune and 3° Norne, in Schwerin and Dessau Foreign Princess in „Rusalka“, at Opéra National du Rhin in Strasbourg the title role of Euryanthe, at Teatro Lirico „Giuseppe Verdi“ in Trieste Ariadne – a role she repeated then also in Darmstadt.
With Mo. Daniel Inbal she performed the 9° Beethoven and 2° Mahler.
Recently she made her debut as Agathe in „Freischütz“ at Opéra Royal de Wallonie in Liège and as Vitellia in „La clemenza di Tito“ with Uwe Eric Laufenberg at the theatre in Sanssouci in Potsdam and sang Marschallin with Asher Fisch as conductor and Maximillian Schell as stage master in the Israeli Opera in Tel Aviv and later on also in Bonn.
Last contracts till 2017/18 include „Vier letzte Lieder“ by Strauss, the role of Ariadne in Limoges, the role of Governess „Turn of the Screw“ by B. Britten in Liège – a role she sings also in Teneriffa -, and again Chrysothemis in Strasbourg. She is heard as Senta with Mo. Gelmetti in Monte Carlo, as Marschallin in Nuremberg, as Elisabeth in „Tannhäuser“ in Trieste, as Marschallin in Cologne, and as Gutrune and 3° Norne in Strasbourg. She sings Chrysothemis in Weimar and in summer Elisabeth in „Tannhäuser“ with Mo. Kuhn in Erl, Magna Peccatrix in 8° Mahler in Ankara and a Strauss Wagner recital in Istanbul, Senta in Athens as well as „Walküre“ at Teatro Massimo in Palermo, “Siegfried” Brünnhilde with Mo. Kuhn in Erl and also in Shanghai.
2017/18/19 she sings Brünnhilde in „Walküre“ in Oldenburg, a Richard Strauss concert at Emy Destinn Festival in Budweis, “Siegfried” Brünnhilde and “Tannhäuser” Elisabeth with Mo. Kuhn in Erl, „Siegfried“ and „Götterdämmerung“ Brünnhilde in Oldenburg and „Walküre“ Brünnhilde in Kassel.
In the 2022/23 season she will sing Brünnhilde again in three ring cycles.
In 2022 she makes her debut as Senta at the New national theater Tokyo.