- “International Relations at 100: The story of academic centenary of International Relations 1919 – 2019” keynote address delivered at the Bandarnaike Center for International Studies “Emerging Scholars symposium, October 24, 2018
- ``Geopolitics beyond the Indian Ocean: The Third Basic Plan of Japan and Free and Open Indo - Pacific Strategy” keynote address delivered at the Sri Lanka – Japan Study Center, University of Peradeniya, August, 2019
- Presented paper on “India – Sri Lanka Relations: An Analysis of India’s development partnership with Sri Lanka since 2009” and chaired session on “India in South Asia” at the International Conference on India’s Foreign Policy Strategies in the 21st century, University of Kerala, India 26 – 28 March 2015.
- Participant the Strasbourg Conference on International Law & Human Rights
- “The Role of International Law to Promote Sustainable Development, Youth Empowerment & Women’s Rights” at the Council of Europe (Strasbourg, France; April 14th – 16th, 2014)
- Symposium Chair “First International Conference on Sri Lanka in World Affairs” organized by the Department of International Relations, Faculty of Arts, University of Colombo, Sri Lanka, July 3 -4, 2014
- “United Nations Peacekeeping: South Asian Perspectives” chaired session on conference organized by the South Asia University and Federick Ebert Stiftung, March 1st, 2014, South Asia University, India
- “United Nations Peacekeeping and Sri Lanka: Trends and Prospects” Conference on UN Peacekeeping and South Asia, University of Dhaka, 24 – 25 August 2013, Bangladesh
- “Afghanistan: Liberal Peace vs Hybrid Peace Governance” Bandaranaike Center for International Studies, 28 June 2012
- “State-building in Afghanistan” Guest lecture, 190th joint seminar of the Institute of Peace Science (IPSHU) and Graduate School of International Development Cooperation (IDEC) University of Hiroshima, Japan, 20 January 2012
- Presentation on “Application of IHL on Sri Lanka’s cultural properties,” Advanced Training on IHL for South Asian Academics, ICRC, Goa, India, March 28, 2010
- “Establishing American Studies in Sri Lanka,” Conference on American Studies, Chittagong, Bangladesh, January 2003
- “Meiji Restoration and its Legacy,” Oration, Sri Lanka – Japan Friendship Society, 14 March 2001
- “Women in Peace-making and Peace-building in Sri Lanka,” War, Peace, Women and Resistance, Juniata College, Baker Institute for Peace, Huntingdon, Pennsylvania, USA 28 September to 3 October 1999
- “Role of the Southern Women in the American Civil War”10th American Studies Conference, Area Study Center, Quaid- I – Azam University, Islamabad, Pakistan, October 2007
- Guest Lecture series (5) on South Asia Peace issues for Postgraduate students of the Master’s Peace studies Program, Graduate School of International Development Cooperation (IDEC) Hiroshima University, Japan, September 2009
- “History of the Administrative Professional:” Keynote address, Seminar on Managing Change in the 21st Century , Annual convention of the Academy of Administrative Professionals, Amaya Lake, Dambulla, Sri Lanka 2007
- “American Society on the eve of the Civil War 1861 – 1865” 8th American Studies Conference, Area Study Center, Quaid-I – Azam University, Islamabad, Pakistan, September 2004
- “Case Study of Sri Lankan Conflict: Analysis of root causes” Hiroshima Peace Builders Program for Human Resource Development in Asia for Peace-building, Institute of Peace Science, Hiroshima University (IPSHU) and Ministry of Foreign Affairs (MOFA), Japan, 3 February 2012
- “Post Colonialism, Nationalization, Liberalization and Authoritarianism: The Conflict in Sri Lanka 1983 – 2009” for Project on Higher Education in Sri Lanka and Malaysia, Osaka University, 6 June 2012
- Co- Panelist on “Sri Lanka’s Civil War,” with CR de Silva/Neil Devotta, Williams College, Massachusetts, USA, April 16, 2004
- “Sustainable peace-building: an application of multi–track diplomacy,” et. al., Advanced Training program in Peace and Conflict Resolution, University of Uppsala, Sweden, 2001
- “American Studies in Asia: Problems, Prospects, Ethnicity and Multiculturalism,” Nagarkot, Bhaktapur, Nepal, September 2001
- “Rediscovering America: American Studies in the New Millennium” Indo-American Center for American Studies (ASRC) Hyderabad, India, March 2000
