Sef van Aken is a consultant and expert with over 10 years of professional experience in regulatory affairs and consultancy. He holds an MSc in Biology. He is experienced in modelling, risk analyses, evaluation of Human Toxicology, Environmental Fate and Ecotoxicology studies, dossier preparations and post-submission activities on national and European level. He performs evaluations as a scientific assessor Ecotoxicology for the Board for the Authorisation of Plant Protection Products and Biocides (Ctgb) in the Netherlands. He carried out many projects on registration and approval of plant protection products and substances (also low risk) for both government and trade and industry. He is a certified ToxRat specialist with extensive experience in evaluation of OECD and non-OECD ecotox studies and statistical assessments. Prior to working at Linge Agroconsultancy, he was research employee at a Dutch research organisation specialised in crop protection in agriculture and horticulture. Sef speaks Dutch as mother tongue and is fluent in English.