He holds an MA in History (with distinction, 1997) from the University of New Hampshire and a PhD in History (2005)from the School of Oriental and African Studies, University of London. He has previously held posts at New York University (2005-7), Long Island University (2002-3) and the School of Oriental and African Studies, University of London (1999-2002). Dr. Machado also worked as a researcher on the Atlantic Slave Trade CD-Rom Project, jointly managed by the Universities of Hull, Chicago, Rochester and Wisconsin (2004), and worked on the Global History of Leprosy Project based at the Wellcome Unit for the History of Medicine, Oxford University (2003).