Heidi Brunner was born in Switzerland, received her musical education in Lucerne, Basle and Zurich before starting her career as a mezzo-soprano with engagements in Basle, Innsbruck, Biel and Dessau. She proceeded to the Komische Oper Berlin (Angelina in La Cenerentola and Charlotte in Werther among other roles). From 1996 to 1999 she was a steady member of the Vienna State Opera and the Volksoper (Rosina in Il Barbiere di Siviglia, Idamante in Idomeneo, Zerlina in Don Giovanni and Nicklausse in Les Contes d'Hoffmann, Sesto in La clemenza di Tito, Adalgisa in Norma and the title-role in La Perichole). In 1998, Heidi Brunner made her debut with both the Munich Opera Festival and the Vienna Festival Weeks in Monteverdi's L'Orfeo. She performed at many important European opera venues, such as the Berlin State Opera, the Bavarian State Opera, the Gran Teatre del Liceu in Barcelona, the Grand Théatre de Genève, the Salzburg Festival and the Vienna KlangBogen Festival. She gave recitals and concerts at various Viennese concert halls, in Milan, Lyon, Paris, Zurich, Basle, Lisbon, Helsingborg, Munich and Duisburg.
New repertoire-experience, such as in Schreker's Irrelohe (Eva), in Schmidt's Notre Dame (Esmeralda), in Hindemith's Mathis der Maler (Ursula) as well as in Schönberg's Erwartung (Frau), directed her to soprano enhancements. Throughout the following years she made her role debuts as Marie (Wozzeck) at the Hamburg State Opera, as Vitellia (La Clemenza di Tito) and as Marta (Tiefland) at the Vienna Volksoper. Further, she sang the role of Donna Elvira (Don Giovanni), Madame Lidoine (Dialogues des Carmelites) at the Theater an der Wien, Kundry (Parsifal) in Turin, Giulietta (Les Contes d'Hoffmann) and the role of The Mother (in Aulis Sallinen's Kullervo) at the Frankfurt Opera as well as Sieglinde (Die Walküre) at the Hamburg State Opera. In the meantime, Heidi Brunner’s repertoire is again focused on mezzo-soprano roles. In 2015, for the first time she sings the role of Mère Marie (Dialogues des Carmelites), followed by Fricka and Waltraute in Wagner's Ring des Nibelungen. Apart from her frequent stage engagements she can be regularly heard in manifold concerts. Most recently she performed Weill’s The Seven Deadly Sins in the Forbidden City of Beijing. Further, Heidi Brunner is known as a highly acclaimed vocal teacher.
Heidi Brunner appears on numerous complete opera recordings such as Così fan tutte, Don Giovanni and Le Nozze di Figaro (SONY/BMG) as well as with excerpts from Tristan and Isolde and the CD-release of Poulenc's Dialogues des Carmelites. Her portrait-album with the Vienna Radio Symphony Orchestra was also released by Oehms Classics.