I am a behavioural psychologist specialized in behaviour change for nature conservation and sustainability. Until ten years ago, I worked on environmental projects with high ambitions but often disappointing impact. Why? Because behaviour change is difficult. Even changing our own behaviour is hard, let alone influencing others. When I was a young boy, the wetlands of my hometown were my playground. I loved to swim, watch birds and fish. One day, my teacher told about our rivers dying from pollution. I came home in tears. Since then, I want to protect our planet. But how could I succeed when efforts to influence behavior mostly fail?Facing this reality was tough. I decided to take up the challenge to find new methods for successful change. This was an adventurous journey. I was fortunate to get support from a great guide and a great mentor: Dr. BJ Fogg who leads the Stanford Behaviour Design Lab and Frits Hesselink, Emeritus Chair of IUCN CEC. They taught me for example how to break down an ambitious goal in doable steps, one of the powerful elements of a good change strategy. My current focus is on developing communication strategies, policies and action plans for my clients, using field-tested methods we developed. I empower their teams with trainings and workshops ranging from storytelling to methods for behaviour change. I work for governments & NGOs and work with teams in Africa and Asia for clients like UNDP, IUCN and World Bank. I hold a master degree in Psychology from University Utrecht and a degree om Environmental Management and Policy from the University of Amsterdam, VU University, the University of Leiden and Wageningen University. In my free time, I still love experiencing nature. Swimming in the rivers around Amsterdam is one of my favourite pastimes. And the good news is that the water is finally clean again. Keywords: -designing communication strategies with teams & stakeholders -facilitating and moderating -training & learning -storytelling -researching with impact -coaching