Tan started practicing shooting at the age of 12 and was selected by the Singapore Sports School after she won a shooting competition.[3]
In 2017, she finished fifth in the women's 10m air rifle at the Asian Shooting Championships in Wako, Japan. At the 2020 H&N Cup in Munich, she won a gold medal in women's 10m air rifle event scoring of 252.7 points and setting a new national record in the process.[4][5]
In May 2021, the Singapore Shooting Federation announced that Tan would represent Singapore at the women's 10m air rifle at the 2020 Summer Olympics in Tokyo after an 18-month long Olympic Selection Trial where she emerged First. During the competition which was held on 24 July 2021 at the Asaka Shooting Range, she attained 21st position with a score of 625.3, making history by achieving Singapore's best finish in the Olympic Games.[6]