Professor of Medicine
- Professor of Medicine and Pneumology and head of department of Pneumology and Intensive Care Medicine in the University Hospital Aachen.
- Member of the Management Board of the German Society for Pneumologie and Respiratory Medicine, West German Pneumologie Society, and Respiratory League.
- Member of the board of Trustees of the German Lung Foundation.
- Ad hoc reviewer of the American Journal of Respiratory and Critical Care Medicine, European Respiratory Journal, Thorax, Chest, Respirology, Respiratory Care, Respiratory Medicine, Journal of Internal Medicine, Journal of Critical Care.
- Associate editor of BMC Pulmonary Medicine and has authored numerous publications.