Tags: Swimmer.
Sia Wai Yen (born January 15 1984 in Kuala Lumpur) is a retired Malaysian swimmer who specialized in long-distance freestyle and individual medley events. She represented Malaysia as a 16-year-old teen at the 2000 Summer Olympics captured a total of four medals in two editions of the Southeast Asian Games (1999 and 2001) and later became a top 8 finalist at the 2002 Asian Games.Sia competed in a medley double at the 2000 Summer Olympics in Sydney.