A dentist by profession, Donald Keith Duncan or D.K. as he is fondly called, has some 45 years worth of knowledge and experience in politics. Dr. Duncan currently serves as Member of Parliament for Hanover Eastern. He is also a member of the Executive Board of the PNP and serves as PNP Regional Chairman for Region VI (St. James, Westmoreland and Hanover). His foray into politics began in 1966 when he was the PNP Campaign Manager in the South Western St. Ann Local Government Elections. He later served as PNP Campaign Manager for various candidates in general elections of 1967 and 1972. During the years 1974-1977 and 1979-1983, Dr. Duncan served as General Secretary of the PNP and was Member of Parliament, East Central St. Andrew 1976 -1983.
In 1977, he was appointed Minister of National Mobilisation & Human Resource. He currently operates a private dentistry practice in Kingston.