Eelco de Koning is professor of diabetology at the Leiden University Medical Center and group leader at the Hubrecht Institute in the Netherlands. He received his medical doctorate at the University of Utrecht, the Netherlands, in 1991. Subsequently, he moved to England and started research into islet biology and pathology at the Diabetes Research Laboratories in Oxford which resulted in a PhD thesis in 1994. In the same year he started his training in Internal Medicine followed by a fellowship in Endocrinology at the University Medical Center Utrecht (UMCU). He was board certified in endocrinology in 2001. He was a visiting scientist at the Department of Islet Transplantation and Cell Biology (Joslin Diabetes Center, Harvard University) in Boston (2004-2005). In 2006 he returned to the LUMC to establish a laboratory for human islet isolation and to direct the clinical islet transplantation program in the Netherlands. In the transplantation center of the LUMC he is focused on the medical work-up and follow-up of páncreas and islet transplant patients. He is Past Chair of the European Pancreas and Islet Transplantation Association (EPITA).