 Felbermayer performed in Vienna in 1950 in Cherubini's "Les deux journées" with the Niederösterreichisches Tonkünstlerorchester, conducted by H. Täubler.She worked in Mozart's "Figaro" with both Erich Kleiber, and with Karl Böhm in 1957 at the Salzburg Festival, where she also appeared in Mozart's "Idomeneo".In Vienna, she performed as Nanette in a 1960 new production of Lortzing's "Der Wildschütz", and as Sandmännchen and Taumännchen in Humperdinck's "Hänsel und Gretel".