Lecturer, Department of Special Education, California State University – Northridge
Adjunct Professor, National University, California
Director, Centre for Education Research Partnership, Rochester Institute of Technology, US
Professor, Department of Research, National Technical Institute for the Deaf, Rochester Institute of Technology
Deputy Director, ESRC Deafness, Cognition and Language Research Centre (DCAL), University College London
Professor, Department of Language & Communication Science, City University, London
Associate Professor, Child Development Division, Educational Psychology, University of Illinois
Initiative Co-Director, NSF-funded National Project " Visual Language and Visual Learning"
Director, ESRC Deafness, Cognition and Language Research Centre (DCAL), University College London
Vice Dean (Research), Division of Psychology & Language Sciences, University College London
Dean of The School of Humanities and Social Science,
The Chinese University of Hong Kong, Shenzhen
Director, Language Acquisition Laboratory, The Chinese University of Hong Kong
Chairman, Department of Linguistics and Modern Languages, The Chinese University of Hong Kong
Associate Professor and Chief,
Division of Speech Therapy, Department of Otorhinolaryngology, Head and Neck Surgery
Associate Professor, Division of Learning, Development and Diversity, Faculty of Education,
The University of Hong Kong
Professor, Division of English Language Education, Faculty of Education, The University of Hong Kong
Director, Childhood Bilingualism Research Centre, The Chinese University of Hong Kong
Professor, Department of Linguistics and Modern Languages, The Chinese University of Hong Kong