From 1984 to 1990 he was co-founder and staff member of the Kontaktgroep Biotechnologie & Samenleving, a NGO that aimed at informing consumer, environmental, farmers, third world and animal welfare organisations, trade unions and church groups about (policy) developments in biotechnology, while he also worked at Section Biotechnology & Food Production of Studium Generale, Agricultural University Wageningen, aiming at fostering societal debate on biotechnology within the scientific community.
From 1990 to mid 1994 he was Co-ordinator of the Clearinghouse on Biotechnology of Friends of the Earth Europe and Co-ordinator Biodiversity of Friends of the Earth International. In that period he was located in Brussels.
Between mid 1994 and 1996 he was employed by a Dutch environmental consultancy, where he was reponsible for organising two conferences for international and regional co-operation on safety in biotechnology, one in Harare, Zimbabwe, and one in Kesztehely, Hungary, and the Pan European conference on potential long-term effects of genetically modified organisms in Strasbourg, France. All three conferences were commissioned by the Netherlands Ministry of Housing, Spatial Planning and Environment.
From 1996 to 1998 he was employed by a communication consultancy, where his main account concerned the introduction of Monsanto's genetically modified glyphosate tolerant soybean on the Dutch market.
In 1998 he decided to found Schenkelaars Biotechnology Consultancy, in order to provide independent and balanced advice to all parties involved or interested in shaping developments in modern biotechnology, life sciences and genomics.
Since 1996 he is member of the Task Group on Public Perceptions of Biotechnology of the European Federation of Biotechnology.
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