After graduating, Chia worked overseas in Switzerland, Japan, London and Boston.[4] He joined the Singapore General Hospital in 2001 and received his qualifications in surgery and orthopedics in 2000 and 2003 respectively.[4] He is also an associate professor at Duke-NUS.[9]
In 2014, Chia succeeded Lam Pin Min as Chairman of the Government Parliamentary Committee for Health.[10]
On 12 April 2020, Chia made a Facebook post detailing his trip to Alexandra Village Hawker Centre to distribute masks amidst the ongoing COVID-19 pandemic in Singapore. He was criticised for apparently violating the circuit breaker (stay-at-home order) to campaign.[11] Chia defended himself, stating that he was there to educate the public to wear masks.[12] The PAP announced that it was suspending all ground engagement activities the next day.[13]
The party affiliation of each member is indicated right after the constituency he or she represents. PAP: People's Action Party; WP: The Workers' Party NMPs do not belong to any party. There were two terms of NMPs in this parliament, with nine NMPs in each term.
The party affiliation of each member is indicated right after the constituency he or she represents. PAP: People's Action Party; SPP: Singapore People's Party; WP: The Workers' Party For NCMPs, Gerald Giam and Yee Jenn Jong are from the WP, while Lina Loh is from the SPP. NMPs do not belong to any party. There were two terms of NMPs in this parliament, with nine NMPs in each term.