• Senior Research Fellow, All Souls College (from 2022)
• Professor of Legal History, London School of Economics (from 2013 to 2022)
• Reader in Law and Professor of Legal History, Queen Mary University of London (from 2001 to 2013)
• Reader in Law, Brunel University (from 1997 to 2000)
• Lecturer and Reader, University of Durham (from 1991 to 1997)
• Junior Research Fellow, St John’s College, Oxford (from 1989 to 1991)
• Junior Lecturer, University of the Witwatersrand (1988)
• Undergraduate and Postgraduate student, Corpus Christi College, Cambridge (1981-1987)