Oliver started working on wearable technology for automated dietary monitoring in 2004 and has co-authored over 200 scientific publications on context recognition, machine learning, biomedical sensor technology, wearable computing, digital health, and embedded systems. He is an Editorial Board member of IEEE Pervasive Computing, IEEE Open Journal of Engineering in Medicine and Biology (OJEMB), Frontiers in Bioengineering and Biotechnology, Frontiers in Computer Science, and the IEEE Journal of Biomedical and Health Informatics. Oliver held Professorships at several European universities. Recently he was elected Professor of Intelligent Embedded Systems at University of Freiburg, Germany and is a director at the Hahn-Schickard research center.