During the early 1950s, Ferro was member of the Graz Opera Company in Austria where his appearances included Mathis der Maler (Truchsess von Waldburg) and Parsifal (Titurel).
The 1960s found him in back in New York City, teaching at Hunter College and later at the Manhattan School of Music where he became chairman of the voice department.
[6] The many prominent opera singers who studied with Ferro include Evelyn Lear,[7] Thomas Stewart,[8] Kathleen Battle,[9] Alan Titus,[1] Rosalind Elias,[10] Patricia Brooks,[11] Sheri Greenawald,[12] Ruth Welting,[13] Youngok Shin, and Richard Stilwell.
The program includes master classes and private voice lessons for young singers, as well as public performances in the Castello di Verrazzano and the town's piazza and churches.
[17] Rodgers & Hammerstein: The King and I – Barbara Cook, Theodore Bikel, Daniel Ferro, Jeanette Scovotti, Anita Darian.