Professor of Theoretical Linguistics, University of Amsterdam

Institute of Early Childhood

professor of English linguistics, Vrije Universiteit Amsterdam

Professor, Institute for Linguistic Studies of the Russian Academy of Sciences

Department of Nordic Studies and Linguistics, University of Copenhagen

Universidad Complutense de Madrid

Researcher, University of Zürich

Professor of Applied Linguistics, Arab Open University - Lebanon

Singapore Institute of Technology

HDR Program Director, Alphacrucis College