Isabelle Cals has sung in many of Europe's major opera houses and concert halls, among them l'Opéra National de Paris, La Scala, Salzburg Festival, Amsterdam Opera, the Barbican Center, Le Théâtre des Champs-Elysées, La Monnaie de Bruxelles, Les Chorégies d'Orange, Il Teatro Regio di Torino, Le Grand Théâtre de Genève, Le Châtelet. Among the conductors with whom she has appeared are Sir Colin Davis (with whom she's recorded The Trojans and Benvenuto Cellini), Alain Altinoglu, James Conlon, Lawrence Foster, Valéry Ghergiev, Daniel Harding, Armin Jordan, Jesus Lopez-Cobos, John Nelson, Antonio Pappano, Michel Plasson.
Recent engagements and projects include Kundry (Parsifal), Sieglinde (die Walküre), Marguerite (La Damnation de Faust), the Foreign Princess (Rusalka), the Duchess (Powder her