On January 7, 2009, Leo Ginsel, Treasurer and member of the executive board of the European Microscopy Society (EMS) died in Mook, The Netherlands. He was born on July 24, 1947 in Leiden where he also studied Biology. He gained his PhD in 1979 by studying the network of interactions between cell coat, surface organelles, lysosomes, uptake and degradation in intestinal epithelial cells. In 1991 he moved to Nijmegen and became full professor of Cell Biology and Histology. Apart from scientific work itself, it became evident that scientific organisations also attracted his attention, so in the period 1996-2003 he was the chairman of the Dutch Society for Microscopy (NVvM). During his career, Leo published many articles, at first concerning his work on intestinal cells; later his studies also included monocytes, macrophages, granulocytes and finally the diaphragm. Many of his articles are written in collaboration with colleagues from other universities and were published in high-ranking international journals. The EMS has seen Leo Ginsel as a hardworking, sympathetic biologist engaging himself in many different aspects of life.