Since 03/2013 Professor for health and nursing sciences Martin Luther University Halle-Wittenberg; 2008-2013 Professor for clinical nursing research Witten/Herdecke University; 2006-2008 Professor for nursing science with the focus on theoretical fundamentals and clinical nursing research, University of Bremen; 1999-2006 research fellow and senior fellow, University of Hamburg; 1987-1998 full time and part-time job, municipal hospital Lüneburg, community nursing in Lüneburg and Hamburg. Major research topics: Efficacy/effectiveness research in nursing; Development and evaluation of complex interventions; Epidemiology of nursing problems, particularly dementia-related care needs in nursing homes and community nursing; mobility, joint contractures, falls and fall-related fractures, use of physical and chemical restraints in nursing homes; Methods of evidence-based nursing/medicine/ patient information.Selected academic voluntary contributions: Member of the Official Expert Panel of the German Health Care System (Sachverständigenrat im Gesundheitswesen); Vice President of the German Network of Evidence-based Medicine (DNEbM); Fellow of the European Academy of Nursing Science (EANS); Member of the Scientific Advisory Board of the German Institute for Quality and Efficacy in Health Care (IQWiG); Editor PFLEGE (Huber) and ZEFQ (Elsevier), Associate Editor BioMed Central Geriatrics (BMC Series) Publications.