- Emeritus Fellow, All Souls College (from 2003 to 2020)
- Professor Emeritus of Criminology and Research Associate, Centre for Criminology, University of Oxford (from 2005 to 2020)
- Reader, then Professor of Criminology (1996), and Director, Centre for Criminological Research (now Centre for Criminology), University of Oxford and Fellow, All Souls College (from 1973 to 2003)
- Adjunct (Visiting) Professor, City University, Hong Kong Law School (from 2008 to 2011)
- Visiting Professor, University of Virginia School of Law (from 2004 to 2011)
- Distinguished Visiting Professor, University of Hong Kong (from 2003 to 2004)
- Fellow, Clare Hall, Cambridge (from 1969 to 1973)
- Assistant Director of Research, Institute of Criminology, University of Cambridge (from 1967 to 1973)
- Lecturer, Social Administration, University of Durham (from 1963 to 1967)
- Research Officer, London School of Economics (from 1961 to 1963)
- Postgraduate, Downing College, Cambridge (from 1958 to 1961)
- Undergraduate, London School of Economics (from 1954 to 1957)
- Death penalty
- Race and sentencing
- Parole
- ‘Is Public Opinion a Justifiable Reason not to Abolish the Death Penalty? A Comparative Analysis of Surveys in Eight Countries’, Berkeley Journal of Criminal Law (in Honour of Franklin E. Zimring), vol. 23 (2), 2018 (forthcoming January 2019)
- ‘Towards the global elimination of the death penalty: a cruel, inhuman and degrading punishment’ (with Carolyn Hoyle), in Pat Carlen and Leandro Ayres França (eds), Alternative Criminologies, London: Routledge, 2017, 400-422.
- ‘Striving to Abolish the Death Penalty: Some Personal Reflections on Oxford’s Criminological Contribution to Human Rights’, in Mary Bosworth, Carolyn Hoyle, and Lucia Zedner (eds.), Changing Contours of Criminal Justice, Oxford: Oxford University Press, 2016, 182-196.
- (with Carolyn Hoyle), The Death Penalty: A Worldwide Perspective (5th edition, Oxford: Oxford University Press, 2015).
- ‘Staying Optimistic’, in Lill Scherdin (ed.), Capital Punishment (Farnham: Ashgate, 2014).
- (with Surya Deva [eds.]) Confronting Capital Punishment in Asia: Human Rights, Politics and Public Opinion (Oxford: Oxford University Press, 2013).
- The Death Penalty in Malaysia: Public opinion on the mandatory death penalty (London: The Death Penalty Project, 2013).
- For a fuller list see link to Curriculum Vitae
- Consultant for the study on Death Penalty in Malaysia for the International Centre for Law and Legal Studies (I-CeLLS Malaysia) (from 2014 to 2016)
- Consultant to the European Parliament on Enhancing EU Action on the Death Penalty in Asia (from 2012)
- Consultant, The Death Penalty Project (from 2003)
- Consultant, Great Britain-China Centre (from 2007 to 2009)
- Member, Foreign Secretary’s Expert Group on the Death Penalty Panel (from 1998)
- Fellow of the British Academy (from 1992)
- Expert Consultant on Death Penalty United Nations (from 1988 to 2005)
- Member, Parole System Review (from 1987 to 1988)
- President, British Society of Criminology (from 1986 to 1989)
- Member, Judicial Studies Board (from 1979 to 1985)
- Member, Parole Board for England and Wales (from 1972 to 1973)
- European Society of Criminology, ESC European Criminology Award 'for a lifetime contribution as a European Criminologist' (2012).
- Beccaria Medal of the International Society for Social Defence and for a Humane Criminal Policy (2011).
- Hon. Ll.D., Edinburgh Napier University (2011).
- Hon. Ll.D., Birmingham University (2008).
- Sellin-Glueck Award, American Society of Criminology 'for international contributions to criminology' (1986).