Paul Tambyah is a Singaporean doctor and professor of infectious diseases, a politician, and a writer. He holds the Singapore Democratic Party chairmanship under Secretary-General Chee Soon Juan.

Born in Singapore in 1965, Tambyah learned Mandarin as a second language in school and can converse in Mandarin. Tambyah graduated from the National University of Singapore with Bachelor of Medicine, Bachelor of Surgery to become a doctor in 1988. He was trained in Infectious disease at the University of Wisconsin and graduated in 1999.

Tambyah became an associate Professor of Medicine in 2001 and eventually became a full professor in 2013. Tambyah subsequently became a president of the Asia-Pacific Society of Clinical Microbiology and Infection and led the Singapore Society of Infectious Diseases from 2011 to 2015. He is also one of the committee members of the Action for Aids Singapore, the only HIV/AIDS agency in Singapore.

He became the assistant Dean at the National University of Singapore's Faculty of Medicine in 2015. In June 2020, he became a president-elect of the International Society for Infectious Diseases, set to become the first Singaporean to hold the position and is expected to start his term in 2022.

Tambyah started getting involved with the Singapore Democratic Party in 2010 and spoke as a guest speaker at the SDP rallies during the 2011 Singaporean general election. He became a member of the SDP's Healthcare Advisory Panel in 2013. In 2015, he became a political candidate as part of the SDP team and contested the Holland–Bukit Timah Group Representation Constituency (GRC) in the 2015 Singaporean general election. On 26 September 2017, he was elected as Chairman by the CEC members during the Singapore Democratic Party 18th Ordinary Party Conference, replacing Wong Souk Yee.

Medicine, Science, Infectious Disease Healthcare, Healthcare Policy, Education Professionals, Education, Singapore, Political,