Jerónimo Mazarrasa is the Director of Programs at the ICEERS Foundation, where his work focuses on maximizing the benefits and minimizing the harms associated with the globalization of ceremonial plant practices. He has collaborated with facilitator communities in processes of self-regulation, developed harm reduction tools, initiatives, and training programs, and commissioned scientific research, as well as legal and policy reports, to help define proposals for the integration of ceremonial plant practices into the societies of the Global North.

Before this, he wrote and produced four documentary films exploring different aspects of the encounter between Western culture and Indigenous knowledge — from the use of ayahuasca in addiction treatment with Gabor Maté, to the Kogi people of Colombia, the Brazilian ayahuasca religions, and Tawai, the last feature film by Bruce Parry.

He has traveled extensively throughout South America, researching a wide range of ayahuasca practices — Indigenous, mestizo, and Westernized — and has lectured internationally on the past, present, and future of the globalization of traditional Indigenous medicines.