She has an active interest in promoting organ donation and transplantation in developing countries and is currently the TTS councillor for the region Middle East/Africa, chair of the TTS Education Committee as well as the president of the Southern African Transplantation Society. Dr Muller has been involved in many transplant-related outreach and educational programmes for the public and medical profession in South Africa through the Organ Donor Foundation of South Africa. She also does outreach work in Africa through the ISN Educational Ambassador’s programme and had been involved in workshops with the World Health Organization. In 2008 she initiated a transplant programme for HIV positive patients utilizing HIV positive donors at Groote Schuur Hospital.