Giel Pieterse represents WYAC and races in the Mpumalanga sailing circuit. Since March 2025, 20 races across 2 regattas have been recorded for Giel. Giel's primary class has been Hunter, with additional appearances in other fleets. Giel's best results include winning the SailingSA events in the multiple fleets fleet, as well as the SailingSA events in the multiple fleets fleet. Giel remains active in regional dinghy racing.