Sandra Warfield performed with the Zurich Opera, where in 1961 she sang Katerina in the world premiere of Martinů's "The Greek Passion". They returned to the United States, and the Metropolitan Opera, in the 1960s. Her performances at the Met included Ulrica in Giuseppe Verdi's "Un ballo in maschera", Berta in "The Barber of Seville" by Gioachino Rossini, Marcellina in "The Marriage of Figaro", Maddalena in "Rigoletto" by Verdi and Erda in Richard Wagner's "Siegfried", totaling 172 performances. She sang the role of Delilah in "Samson and Delilah", with Richard Tucker performing as Samson. In her farewell performance in January 1972, Warfield
Madeleine Boyd Dvořák, with the director Alessandro Talevi. She has worked primarily in Europe with the American opera director Thaddeus Strassberger and the South African opera director Alessandro Talevi. Notable productions include Set and Costume Design: "La Cenerentola", by Gioachino Rossini for Malmö Opera, Sweden; "Orfeo ed Euridice" by Christoph Willibald Gluck, at Theater Augsburg, November 2007; "La Gazzetta" by Gioachino Rossini, Rossini in Wildbad Festival, July 2007. Her designs for Elizabeth Maconchy's one-act operas "The Sofa" and "The Departure", for Independent Opera at Sadler's Wells, in November 2007, were received with acclaim. The Chandos label released a recording of both operas