Chia was the leading Malaysian amateur in the mid-1990s and turned professional in 1996. He plays on the Asian Tour, where he won the 2002 Taiwan Open. He was the first Malaysian to win on the Tour. He has also won several lower profile professional tournaments in Malaysia and elsewhere.
In 2002, Chia became the second Malaysian to play in The Open Championship (and the first from a mainstream Malaysian background; his predecessor Iain Steel has a Scottish father, and attended school in Scotland and college in the United States, and therefore has a much more traditional golfing pedigree). Chia represented Malaysia in the WGC-World Cup in 2001 and 2002.
Amateur wins (6)
1993 Malaysian Amateur Championship, Selangor Amateur Open (Malaysia)
1994 Malaysian Amateur Championship, Selangor Amateur Open (Malaysia)
1995 Malaysian Amateur Championship, Selangor Amateur Open (Malaysia)
Professional wins (14)
Asian Tour wins (1)
2002 Taiwan Open
Other wins (13)
1996 EVA Air Open (Singapore), Jakarta Raya Open (Indonesia)
1999 Singapore Mini Tour event, Malaysian Mini Tour event
2001 Champion of Champions (Singapore), PNB OOM Challenge (Malaysia)
2002 Sime Darby Masters (Malaysia)
2003 Genting Masters (Malaysia), Classic I (Malaysia), Classic II (Malaysia)