INTERNATIONAL AND OVERSEAS OFFICES President of the RSA branch of the ANS (Academy of Nonlinear Sciences) (January 1997-January 2001). Secretary of IAAMSAD (International Association for the Advancement of Methods for System Analysis and Design) (from 1995) Chair of the Africa SIG Chapter of INNS (Africa Special Interest Group of the International Neural Networks Society) (1998-January 2001). representative of A.M.S.E. (Association for Modelling and Simulation Techniques in Enterprises) in South Africa from (1996-2000). one of four Vice-Presidents of A.M.S.E. (Association for Modelling and Simulation Techniques in Enterprises) (1999-2000) serves on the Scientific Advisory Board of the Knowledge Engineering & Discovery Institute, Auckland, New Zealand, from 2003.