After several seasons at Stuttgart (1975–1979) she sang Sieglinde in Patrice Chéreau's production of the The Ring Cycle (1979) at the Bayreuth Festival, where she also sang Isolde (1986).
Later in his life, he became an accomplished music teacher at Curtis Institute in Philadelphia and at the Conservatoire de musique du Québec à Montréal, influencing the careers of such artists as James King, Donald Gramm, Jeannine Altmeyer, Benita Valente, John Reardon, Louis Quilico and Judith Blegen.
Some notable performers who have sung with the company or been presented in concert include: Luciano Pavarotti, Beverly Sills, Renée Fleming, Barbara Dever, Jeannine Altmeyer, Ashley Putnam, Cristina Nassif, Frederick Burchinal, John Aler, Rockwell Blake, Randy Locke, Jake Gardner, Sujung Kim, Frank Porretta, Grant Youngblood, Fabiana Bravo, Mary Elizabeth Williams, Randall Scarlata, and Thomas Rolf Truhitte.