Since September 2019 Peter Schielen is the manager of the Office of the International Society for Neonatal screening, he has been a member of the ISNS-scientific committee for many years and he is the Editor in Chief  of International Journal of Neonatal Screening. His current interest is neonatal screening on the European continent and innovation in neonatal screening (especially molecular testing in NBS). He is involved in the Screen4Rare initiative, a stakeholder network with ISNS as one of its co-founders, to stimulate collaboration between European partners and states concerning neonatal screening. He was a co-organizer of the world congresses of the ISNS in The Hague, Netherlands (2016), Hangzhou, China (2020) Luxembourg-virtual (2021) and Luxembourg live-2025. Peter Schielen has an MSc in Biology and a PhD in Immunotoxicology, both at Utrecht University, The Netherlands. He worked as a toxicologist at the Dutch Institute of Public Health and the Environment (RIVM) until 1999, when he became project leader Down syndrome screening at the reference laboratory for pre-and neonatal screening (RIVM). Since 2013 he was the head of the reference laboratory for neonatal screening (RIVM) where he contributed to expanding the neonatal screening panel. Since October 2020 he is assisting a team at RIVM to implement breast cancer-, colon cancer- and cervical cancer-screening programs on the Caribbean part of the Dutch Kingdom at the Centre for Population Screening-RIVM. Since 2023, he is also a research manager at the Utrecht University Medical Centre-Julius Centre, department of Global Public Health and Bio-ethics. Since 2015 he is technical assessor for the Dutch Accreditation Council (ISO15189-Medical Laboratory Guideline). He has been a member of the Dutch Health Council (commission Pregnancy and Birth) between 2017-2020.