Loubser was born in Hopefield, but finished his schooling at Hoërskool Menlopark in Pretoria.
He made his debut in his side's defeat to the Pumas in the opening match of the competition.
[2] His first (and second) senior tries came the following week in a 73–20 victory over Namibian side the Welwitschias,[3] and he eventually made seven appearances, scoring 22 points.
In 2019, Loubser moved to Port Elizabeth to join the Southern Kings Pro14 franchise.
He made his Pro14 debut in the opening round of the 2019–20 Pro14 season, starting their match against the Cardiff Blues at fullback,[4] and scoring a try in their 27–31 defeat.