is head of the Clinic for Pediatrics with a S. Pulmonology, Immunology and Intensive Care Medicine at the Virchow Clinic of the Charité, a clinical immunologist and was head of the Infection Immunology Section of the Clinic for Pediatrics with a focus on pulmonology, immunology and intensive care medicine until 2014. He is currently working as a senior consultant in the outpatient department of this department (as of 2020)