His current research focuses on the genetic basis of cellular phenotypes, complex traits and disease and precision medicine. He has authored and co-authored more than 160 papers in peer-reviewed journals, many of them in journals such as Nature, Science and Nature Genetics. His research has been supported by the Louis-Jeantet Foundation, the Wellcome Trust, the Swiss National Science Foundation, the European Commission, the Juvenile Diabetes Foundation and the US National Institutes of Health (NIH). He is also the recipient of a European Research Council (ERC) grant. His H-index is 90 and his work has been cited >65000 times (Google scholar Sept 2019). He is the recipient of the 2017 Bodossaki science prize, a highly cited researcher every year since 2014 and past president of the World Hellenic Biomedical Association. He has been invited to give talks and keynote lectures in all important genetics meeting and is the organizer of multiple training courses including the Wellcome Trust HapMap course and co-founder and co-organizer of the Leena Peltonen School of Human Genomics. He has served as an analysis co-chair in the pilot phase of the ENCODE (ENCyclopedia Of Dna Elements) consortium and member of the analysis group of the Mouse Genome Sequencing Consortium and the International HapMap project. He had a leading analysis role in the extension of the HapMap (HapMap3 project) and was a member of the analysis group of the 1000 genomes project and was a co-chair in the GTEx project. He is also member of the Organizing Committee of the International Common Disease Alliance. He has served in the Board of Reviewing Editors of Science (2006-2011) and as Senior Editor and now Consulting Editor in PLoS Genetic and he is currently the Editor-in-Chief of Frontiers in Genetics.