[1] In 2014, Teo set a final meet record in the women's air pistol to claim her first gold medal at the Commonwealth Games.

[1][3] Teo made her international debut at the 2013 Southeast Asian Games in Naypyidaw, Myanmar, claiming the silver medal in the women's 10 m air pistol.

There, she notched the final Games record score of 198.6 points ahead of India's Malaika Goel and Canada's 2012 Olympian Dorothy Ludwig to win her first gold medal in the women's air pistol.

[2][4] When Singapore hosted the 2015 Southeast Asian Games, Teo scored 199.0 in the air pistol final by a 2.3-point lead over Thailand's Pim-on Klaisuban to win the gold medal.

[7][8] In 2022, Teo won the women's 25m pistol event at the International Shooting Sport Federation (ISSF) Grand Prix held at Jakarta, Indonesia.