After graduating and earning his doctorate at the Hannover Medical School, Hashim Abdul-Khaliq was initially based at the department of neonatology of the pediatric clinic at Auguste-Viktoria-Klinikum Berlin for three years. After that, he worked with the Department of Congenital Heart Disease – Pediatric Cardiology at Deutsches Herzzentrum Berlin for twelve years. For the past six years, he has been a senior physician there. After qualifying as a professor at the Humboldt-Universität (Berlin), he accepted a call to the Klinik für Kinderkardiologie at the Saarland University Hospital. Hashim Abdul-Khaliq is a member of the German Society of Paediatric Cardiology (DGPK), the German Cardiac Society (DGK) and the Association for European Paediatric and Congenital Cardiology (AEPC). The pediatric cardiologist additionally advises the patient associations as a member of the medical-scientific board of Marfan Hilfe (Deutschland) e. V., as well as of the advisory board of the Bundesverband Herzkranke Kinder e. V. Hashim Abdul-Khaliq is a member and the Chair of the Competence Network for Congenital Heart Defects Executive Board. He also acts as a member of the research network’s Steering Committee.

Ulrike Bauer studied human medicine at the Humboldt University of Berlin. After finishing her doctorate on echocardiography in congenital heart disease, she was a resident for internal medicine at the county hospital in Chemnitz, after which she transferred to the Institute for Cardiovascular Diagnostics at the Charité Berlin. From there she transferred to the department of pediatric cardiology at the German Heart Center, Berlin (Deutsches Herzzentrum Berlin). Under the guidance of Prof. Dr. Peter E. Lange, Ulrike Bauer started setting up a nationwide register for congenital heart disease. The initiative by Prof. Dr. Peter E. Lange lead to the founding of the association of the National Register for Congenital Heart Defects. It was jointly supported by the board of trustees of Deutsches Herzzentrum Berlin and the cardiac societies, as well as by parent and patient associations. The same year was also the kick-off for creating the Competence Network for Congenital Heart Defects, which could took place thanks to government grants. Ulrike Bauer is a member of the German Society of Paediatric Cardiology (DGK), the European Society of Cardiology (ESC), the German Cardiac Society (DGK) and the Association for European Paediatric and Congenital Cardiology (AEPC).

Gerhard-Paul Diller studied medicine at the Ludwig-Maximilians University in Munich and he received much of his clinical training in Great Britain, at the Royal Brompton Hospital, London. In his research, the certified ACHD expert focuses on adults with congenital heart disease and pulmonary hypertension. In addition, he holds a Master’s degree (M.Sc.) in Health Economics Policy and Management from the London School of Economics, London, UK. Gerhard-Paul Diller is an executive board member of both the European Heart Rhythm Association and the ESC-Working-Group Grown Up Congenital Heart Disease. Furthermore, he is the deputy chair of the AG 9 Kongenitale Herzfehler (working group on congenital heart disease) of the German Cardiac Society (DGK). Gerhard-Paul Diller is a member of the Competence Network for Congenital Heart Defects where he is also a member of the Review Board.

Stefan Orwat completed his medical studies at the Westfälische Wilhelms-Universität (WWU) Münster. In 2004 he received his doctorate here with his dissertation on "Cardiovascular Phenotyping of a Small Animal Model with Autosomal Dominant Polycystic Kidney Disease Type 2 (ADPKD2)" under Professor Dr. med. h.c. Günter Breithardt. In 2018, the specialist for internal medicine and cardiology and ACHD certified expert for adults with congenital heart defects was awarded the venia legendi for internal medicine by the medical faculty of the EMU. As senior physician, the trained emergency physician at the University Hospital Münster has been in charge of the outpatient department of the Clinic for Cardiology III: Congenital Heart Defects (ACHD) and Valve Diseases since 2016, and since 2018 also of the echocardiography of the Clinics for Cardiology I-III. Stefan Orwat is a member of the German Society of Cardiology - Heart and Circulation Research (DGK), the European Society of Cardiology (ESC) and here the European Assocation for Cardiovascular Imaging, the ESC Working Group on Grown-Up Congenital Heart Disease and the ESC Working Group on Valvular Heart Disease.