1. Keynote speech - “Blockchain technology for sustainable development” in: International Conference on Futuristic Technology in Engineering & Innovation in Business Management for Sustainable Development, Panipat, India, 2021.

2. Invited guest lecturer - “Blockchain and Advanced Digitalisation Technologies”, University of Moratuwa, Sri Lanka, 2021.

3. Panel member - “Roundtable September 2020 – Blockchain research in built environment”, The Centre for Smart Modern Construction, University of Western Sydney, Australia. (participation of 237 delegates representing 31 countries), 2020.

4. Keynote speech - “Blockchain driven sustainable built environment” in: 4th International Convention on Interdisciplinary Research for Sustainable Development, Chandigarh, India, 2020.

5. Public talk - “Blockchain beyond cryptocurrencies” in: The Institution of Engineers Sri Lanka, Colombo, Sri Lanka, 2020.

6. Conference Presentation - “Blockchain technology and its potential for the construction industry” in: AUBEA Conference, Australia, 2019.

7. “Developing a Blockchain Based e-Procurement Framework for Construction Supply Chains” in: c4SMC Research Day, Western Sydney University, Australia, 2019.

8. “Blockchain - Future of Trusted Information Systems” in: Leadership Summit on Applied Innovation and Technology, Sydney, Australia, 2019.

9. “Stakeholders’ Perspective on Blockchain and Smart Contracts Solutions for Construction Supply Chains” in: CIB World Building Congress 2019, Hong Kong, 2019.

10. Presentation - “Blockchain - Future of Trusted Information Systems” in: Western Sydney University & Chongqing University Joint Forum on Industry 4.0, Sydney, Australia, 2019.

11. Invited guest lecturer - “Introduction to Blockchain” in: Awareness Program for the Engineering Undergraduate students and academic staff of University of Ruhuna, Sri Lanka, 2018.

12. Keynote speech - “Impact of Free and Open-Source Software Paradigm for Environmental Sustainability” in: The International Conference on Interdisciplinary Research for Sustainable Development (IRSD 2017), India, 2017.

13. Conference Presentation - “Impact of Free and Open-Source Software - Case Study in Higher Education Sector” in: The International Conference on Interdisciplinary Research for Sustainable Development (IRSD 2016), India, 2016.

14. Presentation - “Management Information Systems for Education Sector” in: Training Program for the Administrative and Non-academic staff of Institute of Technology, University of Moratuwa, at Centre for Banking Studies, Sri Lanka, 2016.

15. Conference Presentation - “Adaptation of Diffusion of Innovations Theory for Successful ERP Implementation” in: International Conference on Advances in Computer Science, Electronics & Communication Technologies, Thailand, 2015.

16. Conference Presentation - “Factors Incompatibility of Selection and Implementation of ERP Systems for Construction Organizations - Lessons from Sri Lanka” in: International Conference on Advancements in Engineering, Technology and Management, Thailand, 2015.

17. Presentation - “Education Excellence through E-Learning” in: Faculty Board Meeting, Faculty of Architecture, University of Moratuwa, Sri Lanka, 2015.

18. “Presentation - "Education Excellence through E-Learning” in: Department of Transport and Logistics Management, University of Moratuwa, Sri Lanka, 2015.

19. Presentation - “Education Excellence through E-Learning” in: Department of Management of Technology, University of Moratuwa, Sri Lanka, 2015.

20. Presentation - “Education Excellence through E-Learning” in: Academic Forum of College of Engineering, at Hotel Galadari, Sri Lanka, 2015.

21. Conference Presentation - “Universal Communication Interface through Web Services for Heterogeneous Systems with Dynamic System Life Cycle” in: International Conference in Advances in Computer Science, Electronics & Communication Technologies, Thailand, 2014.

22. Presentation - “Factors influencing the selection and effective implementation of ERP systems in medium-sized organizations in developing countries” in: The Third International Congress of Interdisciplinary Research and Development, Thailand, 2013.

23. Presentation - “Barriers to the successful implementation of E-learning in design education” in: The Third International Congress of Interdisciplinary Research and Development, Thailand, 2013.

24. Presentation - “Benefit of Implementing a National Level ERP system for Health Sectors” in: The Second International Congress of Interdisciplinary Research and Development, Thailand, 2012.

25. Presentation - “Web-based Information Management Systems”, for management and engineering staff of Industrial Safety Division, Department of Labour, Sri Lanka, 2011.

26. Public lecture - “Information Technologies for the Construction Industry”, Public lecture at Institution of Engineers, Sri Lanka, 2011.

27. Presentation - “Management Information Systems for higher education”, for IT support staff, University of Moratuwa, 2011.

28. Presentation - “e-Learning initiative for highly interactive teacher and peer collaborations for students” in the inauguration program of the fresh intake of the University of Moratuwa, 2010.

29. Presentation - “e-Learning and University EMIS”, in the inauguration program of the fresh intake of University of Moratuwa, 2009.

30. Presentation - “Multimedia for future learning environments”, for academic and IT support staff of Department of Civil Engineering, University of Moratuwa, Sri Lanka, 2006.

Television Interviews

• Nanayakkara, N.T.P.G.K.S. 2013. “Enterprise Level IT Solutions for Small and Medium-sized Organizations”, Techno TV, Sri Lanka.

• Perera, S.A.S., Nanayakkara, N.T. P.G.K.S., 2010. “Technology Innovation of State Universities and its Impact on National Economy”, Techno TV, Sri Lanka.