He been a Shambhala practitioner for more than 40 years and was named an acharya in 2009. He leads Shambhala programs and retreats throughout North America, Europe and Latin America. Fleet is also a Roshi (senior lineage teacher) in the Zen Peacemaker and Soto Zen lineages. He is a consultant, executive coach, an internationally renowned social activist and founder of numerous engaged organizations including Prison Mindfulness Institute, Engaged Mindfulness Institute, Center for Mindfulness in Public Safety and the National Prison Hospice