 He is a member of Northampton Sailing Club

At the 1996 Summer Olympics in Atlanta, Walker received the silver medal in the 470 class along with his sailing partner, John Merricks.At the 1996 470-European-Sailing-Championship he won with his Partner John Merricks the bronze medal.On 15 October 1997, both Walker and Merricks were passengers in a minivan in Italy when the driver lost control, and Merricks was killed.