David played squash when she was five years old, and received coaching at the age of eight. While training at the Bukit Dumbar Squash Centre, David was talent spotted by Ee Phoeh Hoon, who led her to represent her home state of Penang, along with her sisters. David's squash career began in 1992 when she won silver in the Under-14 category of the Penang State Junior Championship. Her first national level victory was also in 1992 at the Milo-Dunlop Sport National Junior Interstate Championship, where she won silver in the Under-16 category. In 1994, David was chosen to join the Penang state squash team for the Malaysian Games (SUKMA) tournament where she helped Penang win a gold medal in the team event, despite being ill at the time. In the same year, she won her first two international titles – the Hong Kong U-13 and the Scottish Junior Open Under-12.