His interest for the past 40 years has been in helping people, teams and organisations adapt and change in order to be healthier, functional and effective. Stewart has delivered presentations in Australia, several cities in the USA, the UK, Germany, Singapore, Kuala Lumpur, Prague, Canada, New Zealand, South Africa, and Thailand. He has written over 130 books, book chapters and papers around the topics of learning, change, leadership and organisationalbehaviour.