Despite growing global attention to the 2015 UN Sustainable Development Goals, we have made limited progress towards achieving them. This article describes an emerging Transformative Learning Journey for Sustainability Leadership being developed for professionals at the University of St. Gallen in Switzerland. The purpose is to help participants achieve the individual transformations needed to enact sustainability-focused interventions in their communities and organizations. From a socio-material lens, we describe four phases of the emerging Learning Journey and identify how they are transformative. The Learning Journey includes spending time in nature, growing an understanding of climate justice, collaborating, and planning action. We draw on reflective data from participants, linking them to Hoggan's (2016a) transformative learning outcomes and other relevant studies, the goal being to contribute to the world's collective knowledge of "how" to facilitate development of the transformative skills identified by the United Nations, the European Commission, and the Inner Developmental Goals.