A/Prof Wong is currently a Family Physician, Senior Consultant with Tan Tock Seng Hospital (TTSH) and A/Professor (Clinical Practice) at the Lee Kong Chian School of Medicine (LKCMedicine), Nanyang Technological University (NTU).

His other roles are: Senior Consultant, Professional Training & Assessment Standards Division, Ministry of Health; Chief Medical Officer, NTU and Education Consultant, College of Family Physician Singapore. At the national level, he currently serves as Co-chair of the National Medical Review Committee and as member of the Joint Committee of Family Medicine Singapore.