Prior to entering politics, Chua served in the Singapore Civil Defence Force (SCDF) and had been actively volunteering in grassroots activities with the People's Association (PA) in Tanjong Pagar GRC.
He made his political debut in the 2020 general election as part of a five-member PAP team contesting in Tanjong Pagar GRC and won 63.13% of the vote.
Chua had worked for 17 years in the Singapore Civil Defence Force (SCDF) and Ministry of Home Affairs. He held the rank of colonel in the SCDF and had served as head of operations of the 1st SCDF Division and commander of the 3rd SCDF Division.[5] He was also the director of the SGSecure Programme Office.[5][6]
The party affiliation of each member is indicated right after the constituency/seat he or she represents. PAP: People's Action Party; WP: The Workers' Party; PSP: Progress Singapore Party All of the leaders of the respective GRCs are in underline. MP(s) who is go on a leave of absence is in italic. NMPs do not belong to any party.