After U.S. Army service in World War II he returned to music, teaching, performing, and recording. In 1947, Trampler became a founding member of the New Music Quartet. He was a founding member of The Chamber Music Society of Lincoln Center, and succeeded David Schwartz as violist of the Yale Quartet with Broadus Erle and Syoko Aki (violins) and Aldo Parisot (cello).
Following World War II service, he resumed his musical career by teaching, performing, and recording. In 1947, Trampler became a founding member of the New Music Quartet. He was also a founding member of The Chamber Music Society of Lincoln Center, and took over as violist for the Yale Quartet from David Schwartz alongside Broadus Erle, Syoko Aki (violins), and Aldo Parisot (cello).