Dr. Schielen is a senior scientist at the National Institute of Public Health and the Environment, Centre for Population Screening, in Bilthoven, the Netherlands (RIVM). He earned his PhD from Utrecht University in the Netherlands. He has a background in prenatal screening for Down’s syndrome and adverse pregnancy outcomes and neonatal screening for metabolic and other disorders, and was head of the reference laboratory for pre- and neonatal screening at RIVM until 2020. Since 2020, he has been the quality assurance and science coordinator for a programme focusing on breast, cervical, and colon cancer screening in the Caribbean part of the Netherlands. Implementing screening programmes in a setting with limited resources brings together his passion for screening and global health, and contributes to more equity in public health worldwide, with responsible choices to make the programmes accessible for all, respecting local values, local circumstances, and proper monitoring and evaluation. To establish this, he is partly seconded to the Julius Centre of the Utrecht University Medical Centre, the Netherlands. In another capacity, he is also the manager of the International Society of Neonatal Screening (ISNS). The ISNS, with more than 500 professional members globally, invests in screening programme support in LMIC countries. For the ISNS, he is involved in activities to establish more equity in neonatal screening not only in European states, but also globally.