1975 - '79:
Design Engineer at the VDL Architectural Firm in Amsterdam
from 1979:
Independent Architect in Amsterdam
1979 - '82:
Co-ordinator of Architecture at the Academy for Architecture
in Amsterdam
1987 - '91:
Member of the Amsterdam Planning Authority
In 1990:
Jury-member foundation 'Rotterdam-Maaskant / Archiprix / Mart Stamprijs/Rietveldprijs'
from 1990:
Supervisor of projects including Java-island Amsterdam, de Resident Den Haag, Mariënburg Nijmegen, de Veranda Rotterdam, Dorpsstraat Nootdorp, Haverleij Den Bosch, Marcanti Amsterdam, Centrum Amsterdan Noord, Bergse Haven Bergen op Zoom, Sydhavn Kopenhagen, Houthavens Amsterdam en Stationsgebied Weert
1992 - '95:
External Examinator, Plymouth (UK) School of Architecture
1995 - '96:
Professor Occupying an Endowed Chair, University of Nijmegen
from 1997:
Partnership with Jos van Eldonk
from 2005:
Member advisory board, Academy for Architecture, Amsterdam
2006-2008:
External Examinator, School of Architecture Cardiff (UK)