- 2008: Member of the PhD Committee Lonneke van der PlasGroningen, October, 2008
- 2003: Member of the PhD Committee Frank Joosten, KU Leuven, October, 2003.
- 2001-2003: Begeleidingscommissie van Frank Joosten, Aspirant F.W.O.-Vlaanderen, K.U. Leuven, Faculteit Letteren, Departement Linguïstiek, Belgie.
- 2002: Member of the PhD Committee Anselmo Peñas, Dpto. Lenguajes y Sistemas Informáticos, Universidad Nacional de Educación a Distancia (UNED)
- 1999: Member of the PhD Committee Eneko Agirre, University of Bilbao.
- 1998: Member of the PhD Committee German Rigau, University Polytecnica de Catalunya, Barcelona.
- 1998: Member of the PhD Committee Henny van der Vliet, Faculty of Arts, Free University, Amsterdam.