He debuted with the Philadelphia Orchestra under Eugene Ormandy in 1942, playing Ernest Bloch's Schelomo.
As a member of the Guarneri he collaborated with many of the world's most famous classical musicians, including Leonard Rose, the Budapest String Quartet, Pinchas Zukerman, and Arthur Rubinstein.
He gave the New York premieres of the Solo Cello Sonatas by Zoltán Kodály and George Crumb.
With David Tudor he premiered Earle Brown's Music for Cello and Piano.
Before joining the quartet he played in various venues including the Navy Band (**) during World War II and later with the NBC Symphony Orchestra under the direction of Arturo Toscanini.