Mamat plays on the Asian Tour, where he won for the first time at the 2004 Royal Challenge Indian Open.[2] In 2006 he won the OSIM Singapore Masters, which was co-sanctioned by the Asian Tour and the European Tour. This made him the first player from Singapore to win a European Tour event, and earned him a two-year exemption into the European Tour.[3]
Mamat was the first Singaporean to play in The Open Championship when he qualified in 1997.[4] He has also won several minor professional tournaments and was a member of the winning Rest of Asia team at the 2005 Dynasty Cup.