Who is the Secretary-General of IMO?

List of  Secretary-General of IMO are as follow :

Ove Nielsen (Denmark)	1959-1961​
William Graham (United Kingdom, Acting)	​1961-1963
​Jean Roullier (France)	​1964-1967
​Colin Goad (United Kingdom)	​1968-1973
​Chandrika Prasad Srivastava (India)	​1974-1989
​William A. O'Neil (Canada)	​1990-2003
​Efthimios E. Mitropoulos (Greece)	​2004-2011
​Koji Sekimizu (Japan)	2012-2015​
​Kitack Lim (Republic of Korea)	​2016- till now