Leslie "Les" Lazarus AO (11 December 1929 - 17 December 2022) was an Australian endocrinologist who was one of the first co-Directors of the Garvan Institute of Medical Research, Sydney from 1966 to 1969 and sole Director from 1969 to 1990. At the Garvan Institute he led a joint laboratory and clinical research team studying diabetes and pituitary hormone secretions, in particular the secretion and clinical uses of human growth hormone.[1][2]
From 1974 until 1988 Lazarus was an Associate Professor of medicine at the University of New South Wales and from 1988 until 1995 he was a Professor of medicine at the University of New South Wales. In 1995 he was appointed an Emeritus Consultant to St Vincent's Hospital, Sydney.