He made three appearances for the TUT Vikings in the 2009 Varsity Cup competition and also represented the Blue Bulls U19 in the 2009 Under-19 Provincial Championship.

He was also selected in the South African Under-20 squad that played at the 2010 IRB Junior World Championship in Argentina.

[6] The team qualified for the semi-finals of the competition, but were soundly beaten by New Zealand, losing 7–36 despite Du Preez scoring a try for the Baby Boks just before half-time.

He also appeared at the events in the USA, Australia and Hong Kong before playing in the 2010 IRB Junior World Championship.

[9] In 2023, Du Preez took part in the third season of Premier Rugby Sevens in the United States as a member of the Rhinos x SoCal Loggerheads men's team.