Omgo Nieweg received his medical (1976) and PhD (1983) degrees at the University of Groningen, the Netherlands. He undertook training in nuclear medicine and surgery at the University Hospital Groningen. He completed his surgical oncology fellowship at the MD Anderson Cancer Center in Houston, Texas in 1991. He was a staff member in the Department of Surgery, The Netherlands Cancer Institute in Amsterdam from 1992 to 2013. He joined the Melanoma Institute Australia in 2013 and was appointed to the Royal Prince Alfred Hospital, Sydney Day Surgery and The Mater Hospital in 2014. He is Professor at The University of Sydney.