Dr. McMahan’s primary instrument is classical accordion, and he has tirelessly promoted the instrument in serious contemporary music throughout his career. He has been commissioned to write works for the accordion by various individuals and organizations, including the American Accordionists’ Association and the New York State Council on the Arts. He has recorded on the CRS and Orion labels and is published by Ernest Deffner Music. During his years in the Baltimore area, Dr. McMahan was accordionist for the Baltimore Symphony, Baltimore Chamber Orchestra, Washington Ballet and American Ballet Orchestras (at the Kennedy Center), and for other cultural and performing organizations. He has performed under such notable conductors as Julius Rudel, Rob Fisher, Sarah Caldwell, Sergiu Comissiona, Gunther Schuller, Frederik Prausnitz, Murry Sidlin, bandleader Les Elgart, Leon Botstein, Leon Fleisher, and Peter Schickele, and with Sting, Georgia Brown, Maureen McGovern, Alvin Epstein, Boyd Gaines, and Theodore Bikel. Besides his numerous published articles, Dr. McMahan has been featured in articles by others in Keyboard Magazine, The Music Connoisseur, High Fidelity, Who’s Who in American Composers: Classical, and several other highly regarded publications.