Matthias Sigler is a pediatrician with additional qualifications in pediatric cardiology, neonatology, pediatric intensive care, and ACHD cardiology. He studied medicine at the Julius Maximilian University of Würzburg, the Leopold Franzens University of Innsbruck, and the Philipps University of Marburg, as well as history and art history. He completed his residency in pediatrics at the University Hospital of RWTH Aachen in 2001. From 2001 to 2024, Matthias Sigler worked as a senior physician at the Heart Center of the University Hospital of Göttingen. Since October 1, 2024, he has been Head of the Department of Pediatrics and Adolescent Medicine - Pediatric Cardiology at the University Hospital Münster (UKM). One focus of his research is the development of new and improved interventional therapies for congenital heart defects. Matthias Sigler has established an international research laboratory at the Heart Center of the University Medical Center Göttingen to investigate the biocompatibility of cardiovascular implants. In 2016, he was awarded the Science Prize of the German Society for Pediatric Cardiology (DGPK) for his research in the field of heart valve implants. Another focus of his research and teaching is the morphology of congenital heart defects. Matthias Sigler is a board member of the Working Group on Cardiovascular Morphology of the Association of European Pediatric Cardiologists (AEPC). His clinical interests include diagnostic and interventional cardiac catheterization, the care of patients with complex and particular cyanotic heart defects, including pulmonary arterial hypertension, as well as neonatology and intensive care medicine. He is a member of the Competence Network for Congenital Heart Disease and a member of the Steering Committee of the Research Network since July 2022.