He made his Magners League debut on 1 October, scoring all of Ulster's 19 points in their victory over Glasgow Warriors. Pienaar was named at scrum half in the Magners League Team of the Year for the 2010/11 season and also scooped the Magners League player of the Year award which was voted for by his peers.
On October 1st, he made his debut in the Magners League scoring all 19 points against Glasgow Warriors. Pienaar was selected as the scrum half for the Magners League Team of the Year and also won the Magners League Player of the Year award voted by his peers.