After graduation from NTU, Fok initially joined a big four accountancy firm but left after just five months. He went on to join the Ministry of Education (MOE) to become a teacher as he had a passion for teaching. In 2012, he left teaching after three years, and subsequently, set up JCEconomics.com, a tuition centre at the Bukit Timah Shopping Centre, while doing a doctorate in education. He now spends his weekend tutoring and is self-employed. JCEconomics.com has at least 50 students and he pulls an income of $18,000 a month.