Walter Maetzler is Full Professor for neurogeriatrics and Deputy Director of the neurology department of the University Hospital Schleswig-Holstein in Kiel, Germany. His main clinical interest is on old and geriatric patients, especially with Parkinson’s disease and other disorders associated with functionally relevant movement and cognitive disabilities. He leads a research group focusing on the analysis and validation of mobile sensor technology in supervised (‘lab- or clinic-based’) and unsupervised (‘home-based’) assessments of older adults, geriatric patients and old neurological patients, with a focus on Parkinson’s disease and Parkinsonian disorders. He is involved as Principal Investigator, Chief Clinical Investigator and workpackage leader in multiple international projects investigating the potential of mobile sensor technology to improve our understanding of disease progression and treatment response in these diseases. Examples at a European level are IDEA-FAST (www.ideafast.eu), Mobilise-D (www.mobilise-d.eu), Keep Control (www.keep-control.eu) and Fair-Park II. He led two other European projects, SENSE-PARK (www.sense-park.eu) and Moving beyond (www.moving-beyond.eu). Currently, he serves as the co-Chair of the Technology task force of the Movement Disorders Society and as an advisory board member of the Critical Path for Parkinson’s (CPP) Consortium. Walter Maetzler has co-authored approximately 300 articles in international peer-review journals.