Sailing from WYAC, Giel Pieterse competes in the Mpumalanga dinghy circuit. Giel's earliest SailingSA result dates to March 2025. Since then 10 races across 1 regattas have been recorded. Most of Giel's racing has been in Hunter, with additional starts in other fleets. Key performances include winning the SailingSA events in the multiple fleets fleet, along with the SailingSA events in the multiple fleets fleet. Giel remains an active competitor in the Western Cape sailing circuit.