1971-1972 Military service
1973-2011 Statistics Netherlands
1975-1994 Chief of Research Section of Department for Price Statistics
1984-1994 Deputy Head of Department for Price Statistics
1994-2004 Senior Researcher at Department of Statistical Methods / Methods and Informatics Department
1998-2004 Director of Cerem (Center for Research of Economic Micro-data)
2004-2011 Senior Researcher/Consultant at Division of Macro-economic Statistics and Dissemination
2001-2011 Professor, Rotterdam School of Management, Erasmus University Rotterdam (part time)
2011-2021 Professor emeritus, Rotterdam School of Management, Erasmus University Rotterdam