In April 1946 Yeend made her first major concert appearance as the soprano soloist in Beethoven's "Ninth Symphony" with the Boston Symphony Orchestra under the direction of Serge Koussevitzky. The following summer she performed the role of Ellen Orford in the American premiere of Benjamin Britten's "Peter Grimes" at the Tanglewood Music Festival. Yeend went on to become one of the members of CAM's Bel Canto Trio with Mario Lanza and George London. She toured North America with the group in 1947–1948.