• Worked for 6 years in the Amsterdamse Bos (Amsterdam Forest) as biologist and head of the department of development
• Works nowadays as a city-biologist on town planning and urban design for the department of physical planning of the city of Amsterdam
• Most recent publication: Baltsen tussen baksteen. Beesten in de stad. Uitgeverij Lubberhuizen, 2002.

email: ddr@dro.amsterdam.nl