• Professor and Head Dept of Orthodontics, KU Leuven, Belgium, 1987-2008
• Sabbatical Leave at Radboud University Medical Center, Nijmegen, The Netherlands (to study Genetics and Molecular Life Sciences, Bachelor and Master Level), Academic Year 2008-2009
• Professor of Orthodontics with emphasis on Dental and Facial Genetics, Nijmegen, The Netherlands (2010-2016)
• Professor in the Department of Oral Health Sciences, KU Leuven, Belgium (2016-2017)
• Professor in the Department of Human Genetics and of Oral Health Sciences, KU Leuven, Belgium (2017- now)