[3] While still enrolled in Singapore Broadcasting Corporation's (now MediaCorp) 10th Drama Artiste Course and after a three-month Mandarin-language training stint in Taiwan, Koh started acting at the TV station at the age of 18 in May 1992.
[2][4][5] After having acted in almost 46 dramas,[6] Koh went on to make her debut on stage in the critically acclaimed Men at Forty-Eight in 1997.
In 2015, Koh worked with actress-director Michelle Chong, former radio deejay Daniel Ong, and three other partners to open a 180-seater restaurant, Mischief, at Esplanade.
[10] She is also the national marketing director of the Singapore branch of World Ventures, an American company that offers bulk buy travel deals to its members.
In addition, Koh is also a certified practitioner in alternative healing, specializing in Reiki, the Bach flower remedy system and sound therapy.