A native of St. Catharines, Ontario, David Hetherington is the Toronto Symphony Orchestra (TSO)'s assistant principal cellist. He received his musical training at The Royal Conservatory and the University of Toronto, and furthered his studies in New York, Italy, and Germany with Claus Adam, André Navarra, and Paul Tortelier.

A member of the TSO since 1970, David also teaches cello and chamber music at The Royal Conservatory and the University of Toronto. He coaches the cello sections of the Toronto Symphony Youth Orchestra and the National Youth Orchestra of Canada, and is music director of the Inter-Provincial Music Camp near Parry Sound, Ontario.

As a soloist, David has performed with the TSO, Niagara Symphony, and Symphony Orchestra of Canada. As a chamber musician, he has toured Canada, the United States, Mexico, and Europe, and has performed at the Ottawa, Elora, and Kincardine Music Festivals.

David is a founding member of the Amici Chamber Ensemble, which presents an annual series of concerts at the Glenn Gould Studio in Toronto. He is also a founding member of the string quartet Accordes, which performs regularly for New Music Concerts and other contemporary music organizations. In 2001, the Canadian Music Centre, through Centrediscs, released Accordes's recording of Harry Somers's String Quartets, for which it received a Juno Award nomination.

David has appeared on several recordings for the CBC and Centrediscs, with whom he made the Canadian premier recording of Talivaldis Kenins's prize-winning cello sonata. In addition, he has recorded nine discs with Amici for Summit Records, Naxos, and CBC Records.