David Gottlieb trained in internal medicine and hematology at Westmead Hospital in Sydney and the Royal Free Hospital in the UK. He is currently Professor of Haematology at the University of Sydney. He has been actively involved in clinical stem cell transplantation for over 25 years and is currently a senior physician on the Westmead Hospital Blood and Marrow Transplant Unit and the Medical Director of the Sydney Cellular Therapies Laboratory. His research interests are in the field of cell and gene therapy especially in the manipulation of the immune system post-transplant to reduce opportunistic infection and recurrence of malignant disease. He is currently directing a number of clinical studies of donor-derived and third party antigen specific T cells given to rapidly reconstitute immunity in the post-stem cell transplant setting.