Fleming has been the Matina S. Horner Distinguished Visiting Professor at the
Radcliffe Institute for Advanced Study at
Harvard (2009–2010), a Member of the School of Historical Studies at the
Institute for Advanced Study, Princeton (2002–2003), a Fellow of the
Guggenheim Foundation (2002), a Fellow of the
Bunting Institute at Harvard (1993–94), and a Junior Fellow at the
Harvard Society of Fellows (1986–89). Fleming is a fellow of the
Massachusetts Historical Society, the
Royal Historical Society, the
London Society of Antiquaries, and the
Medieval Academy of America. In 2022, Fleming gave the
Ford Lectures at Oxford on "Dogsbodies and Dogs' Bodies: A Social and Cultural History of Roman Britain’s Dogs and People". Fleming served as president of the Medieval Academy of America from 2023 to 2024. ==Bibliography==