Since 2003 I am Full Professor at the University of Luxembourg. I direct a research group on aggression, especially violence in school and cyberbullying, as well as approaches to health promotion. I have been project manager of national and international scientific projects on violence in school and anger.
I authored and co-authored more than 80 papers in international journals and books and I am the editor or co-editor of 18 books. I co-chaired COST Action IS0801 on Cyberbullying.