Sailing from ZYC, Ruben Holtzhuizen competes in the KwaZulu-Natal dinghy circuit. Ruben's earliest SailingSA result dates to January 2025. Since then 10 races across 2 regattas have been recorded. Ruben competes mainly in the Topaz Uno fleet, alongside races in other fleets. Key performances include winning the 2025 Hmyc Grand Slam in the Topaz Uno fleet, along with the 2025 Hmyc Grand Slam in the Topaz Uno fleet. Ruben remains active in regional dinghy racing.