| 2007–2013 |
Member of the Committee “Grote investeringen” of the Netherlands Organisation for Scientific Research (NWO). |
| 2004–2007 |
Chairman of the Advisory Committee for the Corpus of Spoken Dutch |
| 2002–2004 |
Chairman of the board of the Corpus of Spoken Dutch. |
| 2000–2004 |
Vice-dean for research of the faculty of humanities, Utrecht University |
| 1999–2004 |
Member of the Board of the Dutch-Flemish project “Corpus Spoken Dutch” |
| 1997–2004 |
Chairman of the Board of the Foundation for Language Technology |
| 1995–2004 |
Member of the board of the Dutch National Graduate School in Linguistics. |
| 1995–1997 |
Member of the Research Committee of the Faculty of Arts, Utrecht University |
| 1994–1994 |
Director of Research of the Dutch National Graduate School in Linguistics |
| 1992–1993 |
Secretary of the board of the Dutch National Graduate School in Linguistics (LOT) |
| 1989–2007 |
Chairman of the Board of the Foundation for Speech Technology, |
| 1989–1997 |
Secretary of the Board of the Foundation for Language Technology |
| 1989–1991 |
Coordinator of the Dutch national Research Programme "Analysis and Synthesis of Speech (ASSP)" |
| 1988–1994 |
Director of the Research Institute for Language and Speech (OTS), Utrecht University |
| 1988–1992 |
Chairman of the Dutch national PhD-training network FUNTA (Fundamental linguistics and phonetics) |
| 1986–1987 |
Member of the editorial board of Language and Cognitive Processes |
| 1974–1977 |
Secretary of the board of the Dutch Foundation for Linguistics |
| 1973–1989 |
Member of the editorial board of the Journal of Phonetics |
