Kingston was born in Ottosdal, South Africa. He turned professional in 1988, and is currently a member of the European Tour and the Sunshine Tour. He has also competed on the Asian Tour, where he collected four tournament victories.

In 2007 Kingston finished top of the Order of Merit on the Sunshine Tour, aided by his victory at the European Tour co-sanctionedSouth African Airways Open. That win was his first on the European Tour, and helped him to his best Order of Merit finish of 17th in 2008.

Victory at the Sunshine Tour's Vodacom Championship in February 2008, lifted Kingston into the top 100 of the Official World Golf Rankings for the first time.

Kingston secured his first win of 2009 with a playoff triumph against Anders Hansen at the 2009 Mercedes-Benz Championship in Cologne.