2019-current   Director Netherland Institute of Ecology (NIOO)

2009-current   Professor Conservation Biology at the Institute of Environmental Sciences, Leiden University

2012-2019      Dean of the Faculty of Science, Leiden University

2009-2012      Director of the Institute of Environmental Sciences, Leiden University, and head of the Department of Conservation Biology

2003-2012      Professor, special chair Nature Conservation on Farmland, Wageningen University, Department of Nature Conservation and Plant Ecology

2000-2008      Associate professor and head of the Department of Environmental Biology of the Institute of Environmental Sciences, Leiden University

1994-2000      Assistant professor at of the Institute of Environmental Sciences, Leiden University, since 1996 head of the Section Ecosystems and Environmental Quality

1996-1997      Postdoc NWO-STIMULANS-grant

1990-1994      Qualified researcher NWO, PhD project

1986-1990      Researcher at the Institute of Environmental Sciences at Leiden University

Education

1995                PhD Environmental Science, Leiden University, Leiden

1986                MSc Biology (Ecology / Ecotoxicology), Free University, Amsterdam

Ancillary positions

• Professor in Conservation Biology at the Institute of Environmental Sciences (CML) of Leiden University (2009 - current)
• Conference Ambassador Leiden Municipality (2014 - current)
• Member Dutch Council on Animal Affairs (Raad voor Dierenaangelegenheden). The independent council gives advice to the Minister of Agriculture, Nature and Food Quality on multidisciplinary issues in the field of animal welfare and health (2018 - current)
• Member Policy Committee of the Europe Section of the Society for Conservation Biology (2018 - current) 
• Chair of Netherlands Centre for One Health Supervisory Board (2019 - current)
• Member Senior Academic Promotions Committee Trinity College Dublin (2019 - current)
• Member Beheer Advies Commissie, Geldersch Landschap en Kasteelen (2020 - 2024)
• Member Council for Biology (2021 - current)