Aisling’s research is cross-disciplinary and explores the history of international criminal law and international human rights law through socio-legal approaches and empirical (archival) research. Her research themes include universal jurisdiction in international criminal law, immunity of state officials in international criminal law, critical international legal theory and international law histories. Her current research projects include a journal article on 'The Eichmann Trial and Universal Jurisdiction' and co-authored monograph on the Ireland v UK case under the European Convention on Human Rights.

Aisling is willing to supervise PhD researchers in the fields of critical approaches to international criminal law and procedure, jurisdiction of national and international tribunals and immunity of state officials in international criminal law, transitional justice mechanisms, history of international criminal law and the politics of inter-state human rights litigation and human rights treaty drafting.





A. O’Sullivan, Universal Jurisdiction in International Law: The Debate and the Battle for Hegemony (Routledge, 2017)


Book chapters

A. O’Sullivan, ‘Same-Sex marriage and the Irish Constitution’ in P Chan (ed) Protection of Sexual Minorities since Stonewall (Routledge London 2010) pp343-358.


Journal Articles

A. O’Sullivan, ‘Ireland and the Genocide Convention: An unhurried Countdown to Accession (1948-1976)’, (2015) 54 Irish Jurist 31.

A. O’Sullivan, ‘Same-Sex marriage and the Irish Constitution’ (2009) 13(2-3) International Journal of Human Rights (April-June 2009) 477.

A. O’Sullivan and W. A. Schabas, ‘Politics and poor weather: How Ireland sued the UK under the ECHR’ (2007) 2 Irish Yearbook of International Law 3.

A. O’Sullivan and PWC Chan, ‘Judicial review in Ireland and the relationship between the Irish Constitution and Natural Law’ (2006) 15(2) Nottingham Law Journal 18.



KRW Law, CAJ (Belfast) and Irish Department of Foreign Affairs

Consulted on archival research on the Ireland v UK case (2014 and 2016)

RTE Investigations Unit, RTE Prime Time Investigates

Consulted on the archival research on the Ireland v UK case (2014)

Senior Counsel, Northern Ireland Coroner’s Office (Stalker/Sampson Inquest)

Consulted on empirical research methods for British Archives government research (2014)

Irish NGO Marriage Equality

Consulted on Constitutional law and on legislative history of Civil Partnership Act 2010 (June 2010 and March 2011)


Conferences and Presentations


International Conference Papers

  • The Struggle to Build a Court of Humanity that never adjourns’, European Society of International Law Annual Conference, Riga, Latvia (Sept 8th 2016)
  • ‘The Principle of Universal jurisdiction: Charting the hegemonic movements from Pinochet onwards’, HAC Conference ‘The Politics of Justice’, International Institute of Social Sciences, The Hague, Netherlands (October 12th-13th 2012)
  • ‘How Ireland sued the United Kingdom under the ECHR’, Roundtable on Human Rights, Faculty of Humanities, University of Sydney (August 14th 2009)
  • ‘The duty to prosecute and victim’s right to know’, Postgraduate Conference on Criminal Justice & Human Rights, University College Cork (May 5th 2008)
  • ‘The Stake of Inter-State disputes: the Ireland v. UK case’, The Diplomacy of Human Rights Conference, Irish Cultural Institute, Paris (with Professor Schabas)(Dec 7th 2007)
  •  ‘Sean MacBride and the drafting of the ECHR’, ACAT Conference on Ireland and Human Rights, Irish Centre for Human Rights (July 11th 2006)


National Conference Papers

  • ‘The debate over Immunity of State Officials under International Criminal Law’, Society of Legal Scholars Annual Conference (Sept 5th 2016).
  • ‘Universal Jurisdiction in International Law: A Battle for Hegemony’, Critical Law Conference, University of Sussex (4-6 September 2014)
  • ‘“Preventing Impunity” vs “Avoiding Abuse”: Battling for Hegemony in the debate on Universal Jurisdiction in International Law’, Perspectives on Conflict Conference, University of Glasgow (June 6th 2014)
  • ‘Hegemonic and Counter-Hegemonic positions in the ICJ’s Obligation to Prosecute or Extradite case’, Socio Legal Studies Association Annual Conference, Robert Gordon University Aberdeen (April 10th 2014)
  • ‘Hegemonic and Counter-Hegemonic Positions in the debate on Universal jurisdiction in absentia’, Conference on Critical Approaches to International Criminal Law, School of Law, University of Liverpool (December 6-7th 2012)
  • ‘The duty to investigate under International Human Rights law’, Socio-Legal Studies Association Conference, University of Manchester (March 18th 2008)
  • ‘Universal jurisdiction and the practice of Spanish courts’, Moving Forward Conference, University of Aberdeen (June 12th 2007)
  • ‘Can inter-State complementarity strengthen Universal jurisdiction?’ International Criminal Accountability Conference, University of Nottingham (Feb 12th 2007)


Invited Talks and Faculty Presentations



  • 'The Politics of Inter-State Human Rights Litigation: The Ireland v UK case', Centre for Crime, Justice and Victim Studies, University of Limerick (12th November 2015)
  • 'The Politics of Human Rights Litigation: The Ireland v UK case', Rights Research Seminar Series, Sussex Centre for Human Rights Research (14th October 2015)
  • ‘International Criminal Law in Domestic Courts’, Sussex Law  Seminars (26th Nov 2014)
  • 'Prosecuting Heads of State before the International Criminal Court', University of Washington, Seattle Summer School on Challenges of International Justice, Irish Centre for Human Rights, NUI Galway (26th August 2015)
  • ‘On immunity of State officials in international criminal law, Doctoral Seminar, Irish Centre for Human Rights, NUI Galway (April 22nd 2013)
  • ‘Same sex marriage and the Irish Constitution’, Guest Lecture to MPhil Human Rights in Theory and Practice, Trinity College Dublin (March 23rd 2010)
  • Rights of Accused in International criminal proceedings’Guest Lecture to LLM in HR and Criminal Justice, School of Law, University of Limerick(Nov 26th 2008)
  • ‘Universal Jurisdiction in absentia’, Doctoral Seminar, NUI Galway (April 2008)
  • Enforcement of Human Rights Law’, Guest Lecture to MA in Human Rights and Public Advocacy, NUI, Galway (November 2007 and 2008)
  • ‘Double-edged sword: Applying complementarity to universal jurisdiction’, Doctoral Seminar, Irish Centre for Human Rights, NUI Galway (April 24th 2007)