[1] Siew tasted her first success in 2012 at the 420 World Championships, winning gold medals at both the U16 and U18 categories.

Siew went on to win the gold medal in the 420 class at the 2013 Southeast Asian Games held at Myanmar.

[3] Siew's success continued at the Incheon Asian Games 2014 where she won a gold medal on the 420 class with Kimberly Lim.

[4] Siew subsequently competed in the 470 class in the 2015 Southeast Asian Games.

[1] She came in third during the competition but was not awarded the bronze medal as there were only three teams for the race.