53rd Annual Congress of the South African Mathematical Society, 3-5 November 2010, University of Pretoria, Congress hosted by the Department of Mathematics and Applied Mathematics under my headship. 

Co-organizer with BD Reddy: Special session on Theoretical and numerical aspects of dynamical systems, partial differential equations and inequalities, arising in applications, Joint Congress of the South African and American Mathematical Societies, 29 November -3 December 2011, Port Elizabeth.

Member of the Steering committee from 2011:Annual International BIOMATH Conference, Sofia, Bulgaria

Member of the Scientific Committee: IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications, Shangai, China, 31 October – 3 November 2012.

Co-chair of the Joint UNISA-UP Workshop on Theoretical and Mathematical Epidemiology, 3-8 March 2014, Florida Campus of UNISA

Co-chair of the second Joint UNISA-UP Workshop on Theoretical and Mathematical Epidemiology, 2-7 March 2015, HPC, University of Pretoria

Co-organizer, Mini-Workshop on Theoretical and Mathematical Epidemiology, 12 June 2015, University of Pretoria.

Co-organizer, AMS Special Session on Advances in the Applications of Nonstandard Finite Difference Methods, Virtual Joint Mathematics Meetings, 6-9 January 2021, USA

Member: Scientific Committee of the 10th Pan African Congress of Mathematicians (PACOM), African Mathematical Union, 2-7 August 2021, Brazzaville, Republic of Congo.

Organizer: Special Session on Mathematics of emerging and reemerging human infectious diseases of major public health importance, 21st World Congress for International Association of Mathematics and Computers in Simulation (IMACS 2023),11-15 September 2023, Rome, Italy.