Jos Kleijnen is the Director of Kleijnen Systematic Reviews Ltd. Following his graduation from medical school, he pursued a career as a clinical epidemiologist and has a wealth of experience in conducting and disseminating systematic reviews and other research. He has served on the Boards of the Cochrane Collaboration, the Guidelines International Network, and the Joanna Briggs Institute. He was the founding Director of the Dutch Cochrane Centre (1994-1998); Professor and Director of the Centre for Reviews and Dissemination at the University of York, UK (1998-2005); Clinical Professor at the Joanna Briggs Institute at the University of Adelaide, Australia (2011-2016); and is a member of several Methods Working Groups of the Cochrane Collaboration. Jos teaches in courses on systematic reviews and EBM in several countries, including Austria, Sweden, Poland, the Netherlands and the UK. He also is Professor of Systematic Reviews in Health Care at the School for Public Health and Primary Care (CAPHRI), Maastricht University, The Netherlands (2011 – present).