Teo Chee Hean (simplified Chinese: 张志贤; traditional Chinese: 張志賢; pinyin: Zhāng Zhìxián; Pe̍h-ōe-jī: Tiuⁿ Chì-hiân; born 27 December 1954) is a Singaporean politician. A member of the governing People's Action Party (PAP), he is currently the country's Deputy Prime Minister, Minister for Home Affairs, Co-ordinating Minister for National Security and Minister-in-charge of the Civil Service. He has previously served as the Minister for Defence (2003–11), Minister for Education (1997–2003) and Minister for the Environment (1996–97). He has been a Member of Parliament (MP) since 1992.
Prior to entering politics, Teo was a Rear-Admiral (RADM) in the Republic of Singapore Navy (RSN), and served as Singapore's Chief of Navy from 1991-92.