Gerbrich Kozijn works as a legal and strategic advisor on sustainability communication. She specialises in green claims legislation and policy developments. She has worked at the Dutch Authority for Consumers and Markets for 10 years as a sustainability strategist. In this role, she founded the green claims enforcement team and co-wrote the Guidance on Sustainability Claims. Also, she pursued the development of green claims research, several enforcement cases and the international cooperation in anti-greenwashing. Today, she advises governmental and public organisations as well as companies on sustainability and communication.