He was the number one ranked South African amateur golfer before turning professional in 2005 and then joined the Sunshine Tour by finishing 4th at Q-school.

In 2012, Roos picked up his third victory on Tour at the Platinum Classic after he defeated Chris Swanepoel and Anthony Michael on the fifth hole of a sudden-death playoff.

[1] He picked up his second Sunshine Tour victory of the year in June at the Lombard Insurance Classic after defeating Justin Harding in a playoff.

Roos would pick up his sixth overall Sunshine Tour victory in April 2013 when he won the Golden Pilsener Zimbabwe Open by a single stroke.

In March 2014, he won the Barclays Kenya Open and earned a place on the Challenge Tour for the rest of 2014.