Nicolas Ray is Associate Professor at the Institute of Global Health of the University of Geneva, directing the Division Human, Animal, and Environmental Health, heading the GeoHealth group, and directing the Doctoral program in Global Health. He is also a member of the Institute for Environmental Sciences, where he directedthe Hub "Digital Sciences for environment and health" from 2017 to 2024. After studying Biology at University of Lausanne, he obtained a Master in Environmental Sciences and a PhD in Biology from University of Geneva, followed by three post-doctoral positions (University of Southampton, University of Melbourne, and University of Bern). He has a long-standing inter-disciplinary research experience in spatial ecology, population genetics, spatial data infrastructure, GIS, and global health, with a focus on developing and applying models of physical accessibility to health services. He was previously seconded for nine years to UN Environment/GRID-Geneva office, where he was heading the Environment Modeling & Geoprocessing Unit and was the Technology Director of the global MapX initiative. He is currently leading several projects directed toward geospatial modelling at the interface of global health and environmental sciences, and with an emphasis on low- and middle-income countries. He was the Co-PI of the SNF project SNAKE-BYTE (2018-2022), a country-wide epidemiological study on the epidemiology of snakebite and the access to antivenom in Cameroun and Nepal. He is co-directing the development of ACCESSMOD, an open-source tool to model geographic accessibility to health services using realistic movements of patients, which he implements in more than 20 countries through projects with UNFPA, UNICEF, UNDP, The Global Fund, FIND, WHO, and the World Bank.