David Marcus made his Olympic Games debut in 2012. The equestrian rider competed in the individual and team dressage events, but was eliminated.

Born in Omaha, Nebraska, Marcus began riding at the age seven. In 1996, moved to Canada to train with Olympic-level coaches while also pursuing his university education.

At the end of 2011, Marcus became a Canadian citizen, and immediately began representing his new home country successfully at the Grand Prix level with Chrevi’s Capital and Don Kontes. In his Canadian Team debut at the 2012 CDIO3* Wellington Dressage Nations’ Cup in Wellington, Florida, Marcus and Chrevi’s Capital proudly wore the Maple Leaf, scoring a win for Canada.