Kenneth Andrew Jeyaretnam (born 1959) is a Singaporean politician and hedge fund manager who has been appointed as the Secretary-General of the opposition Reform Party since 2009.

Between 1977 and 1980, he returned to Singapore for National Service, and then went on to read economics at Queens' College, University of Cambridge, from which he graduated with double first class honours in 1983.

[2] After graduating from Cambridge in 1983, Jeyaretnam applied to work at the Monetary Authority of Singapore and other financial institutions and banks, but his applications were turned down.

He worked at Continental Bank, Banque Indosuez and Nomura International before he became a hedge fund manager focusing on event-driven investing.

Jeyaretnam contested in the by-election, which turned out to be a four-cornered fight pitting him against three other candidates: Koh Poh Koon of the PAP; Lee Li Lian of the Workers' Party; and Desmond Lim of the Singapore Democratic Alliance.

[14] His younger brother, Philip Jeyaretnam, has been a judge of the Supreme Court since 2021 and was one of the youngest lawyers to be appointed Senior Counsel in 2003 at the age of 38.