2019. Is HCI/UX Ready for the Fourth Industrial Revolution? Keynote address at INTERACT 2019, The 17th IFIP TC.13 International Conference on Human-Computer Interaction, Paphos, Cyprus, 5 September 2019.
2016 (With Janet Wesson): HCI in Africa: A Technological Future? Keynote address at AfriCHI 2016, Nairobi, Kenya, 25 November 2016.
2016. Designing a National Health Normative Standards Framework from a Care Scenario Perspective. Invited address, IFIP Open Symposium on HCI. University of West London, London, UK.
2015. Achieving Interoperability in Healthcare. Keynote address at SAHIA IHE workshop, Pretoria, 19 November 2015.
2014. An Overarching eHealth Architecture for South Africa. Presentation to NHIS/SA Committee, 15 April 2014.
2012. Technical and Socio-technical Approaches to Health Informatics in Africa. Keynote Address at the IASTED Health Informatics 2012 Conference, held in Gaborone. Botswana, from 2 to 6 September 2012.
2009. HCI and Design Research in the Southern African Context. Invited Address, Cape Peninsula University of Technology, 18 March 2009.
2009. Crossing the Digital Divide. Keynote address at Bridging the Digital Divide Network Conference, 6 January 2009, Cambridge (UK).
2007. Cultural Factors in Mobile Phone Adoption and Usage. Invited Address at ‘The state of current research in HCI/ Seminar, Salamanca, Spain, 26 March 2007.
2006. What Users are Like: Cognition, Perception, Physiology, and Human Failure, F H Joanneum University of Applied Sciences, Graz, Austria, 18 December 2006.
2002. Human-computer Interaction Education, Research and Practice in Southern Africa. Keynote Address (SA Introductory Speaker), INDO-SA Workshop on Advanced Computing, Pretoria, 28 October 2002.
2002. Business, Information, Technology, and Management: Bit Don’t forget the Human Component. Keynote Address at BIT 2002 Conference, Manchester, United Kingdom, 5‑7 November 2002.
2001. The importance of feedback in e-commerce. Invited address, AB Framkom Research Institute, Stockholm, Sweden.
2001. The thesis writing and examination process. SAICSIT 2001. Keynote address at the SAICSIT 2001 Postgraduate Research Symposium, 28 September 2002.
2015. eStrategies Africa, Chairperson eHealth Roundtable (http://estrategies.co.za), November 2015, Cape Town, South Africa.