Council of Association for Symbolic Logic
Member, Executive Committee : 2005 to 2009
Singapore Mathematical Society :
President : 1995
Singapore Mathematical Society
Honorary Treasurer : 2010, 2009, 2003, 2002
Singapore Mathematical Society
Vice President : 2017
Committee Member : 2016
Singapore Mathematical Society
Committee Member : 2015, 2011
Assistant Treasurer : 2012
Editor : 2005 to 2008
Assistant Editor : 1998 to 2000
Committee Member : 1996 to1997
Singapore Mathematical Society
Committee Member : 1998
Singapore Mathematical Society
Honorary Secretary : 2010 to 2013
Assistant Secretary : 2009
Committee Member : 2008
Singapore Mathematical Society
President : 2006 to 2008
Vice President : 2001 to 2003
Committee Member : 2000
Honorary Secretary : 1999
Assistant Secretary : 1996 to 1998
Singapore Mathematical Society
Committee Member : 1995
Singapore Mathematical Society
President : 2001 to 2005
Vice President : 1998 to 2000
Committee Member : 1996
Honorary Secretary : 1995
South East Asian Mathematical Society (SEAMS)
President : 2004 to 2005
Singapore Mathematical Society
President : 2017
Vice President : 2012 to 2016
Editor : 2012 to 2014
Honorary Treasurer : 2011
Committee Member : 2010
Honorary Secretary : 2006 to 2009
Assistant Secretary : 2005
Assistant Editor : 2002 to 2004
Singapore Mathematical Society
Assistant Secretary : 2001 to 2002
Singapore Mathematical Society
Vice President : 2013 to 2016
Singapore Mathematical Society
Assistant Secretary : 2014 to 2017
Committee Member : 2012 to 2013
Singapore Mathematical Society
Editor : 2002 to 2004
Assistant Editor : 2000 to 2001
East Asia Committee on Logic, a committee of the Association for Symbolic Logic
Chair : 2009 to 2012
Singapore Mathematical Society
Honorary Treasurer : 2006 to 2007
Singapore Mathematical Society
Honorary Treasurer : 2005, 2004, 2001, 2000
Singapore Mathematical Society
Honorary Treasurer : 1998 to 1999
Singapore Mathematical Society
President : 2009 to 2012
Vice President : 2005 to 2008
Honorary Treasurer : 1996 to 1997
Southeast Asian Mathematical Society
Vice President : 2012 to 2013