Smith competed for the men's 4 × 400 m relay at the 2008 Summer Olympics in Beijing, along with his teammates L. J. van Zyl, Ofentse Mogawane, and Alwyn Myburgh. He ran on the starting leg of the first heat, with an individual-split time of 45.74 seconds. Smith and his team finished the relay in sixth place for a seasonal best time of 3:01.26, failing to advance into the final.