Editor, Board Member and Professional Organisations
- 1991-1994 Member of the editorial advisory board of the international journal TESOL Quarterly (Teachers of English to Speakers of Other Languages, USA).
- 1989-1994 Member of the editorial advisory board of Die Unterrichtspraxis. Teaching German (American Association of Teachers of German).
- Since 1997 Co-editor of the series Gießener Beiträge zur Fremdsprachendidaktik (Publisher: Narr).
- 1999-2001 Advisory board member of the German Association for Foreign Language Research (DGFF Deutsche Gesellschaft für Fremdsprachenforschung).
- 2001-2003 President of the German Association for Foreign Language Research (DGFF Deutsche Gesellschaft für Fremdsprachenforschung).
- 2003-2011 Advisory board member of the German Association for Foreign Language Research.
- 2002-2012 Advisory board member of the Goethe-Institut Munich.
- Since 2004 Advisory board member of the Zeitschrift für Fremdsprachenforschung (ZFF)
- Since 2004 Advisory board member of The English Academy, Bildungshaus Westermann. Diesterweg & Schroedel.
- 2007-2012 Member of the Research Standing Committee of TESOL (Teachers of English to Speakers of Other Languages).
- Since 2010 Advisory board member of the German Federal Office of Administration. Central Agency for Schools Abroad.
- Since 2012 Member of the Board of Trustees of The International Research Foundation for English Language Education (TIRF).