A 400m runner with a personal best of 51.23 (set in May 2005), Smith has never reached an international final in an individual race. However, she was a part of the Jamaican 4 x 400 meters relay teams that won the bronze medal at the 2003 World Championships and the silver medal at the 2005 World Championships. She ran for the relay team at the 2004 Summer Olympics, but only in the qualifying heat. Before the final heat she was replaced by Novlene Williams, with whom Jamaica eventually won the bronze medal.