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Professor Declan O'Sullivan

Professor In (Computer Science)

Declan O'Sullivan is a Professor in Computer Science in the School of Computer Science and Statistics. He is a co-champion of the Trinity Digital Engagement interdisciplinary theme, and a Principal Investigator at the Science Foundation Ireland (SFI) ADAPT Research Centre ( He was Head of the Discipline of Artificial Intelligence from 2012-2018. He was Director of Research and Deputy Head of School from 2017 to 2023.

Declan was elected as a Fellow of Trinity College Dublin for the quality of his research and contribution to college in 2019. He was awarded a B.A. (Mod) in Computer Science from TCD in 1985, an M.Sc. in Computer Science from TCD in 1988, and a Ph.D. in Computer Science from TCD in 2006. Declan has 13 years of research experience in industry, having worked for IONA Technologies from 1995 to 2001 and from 1988 to 1995 with Broadcom Eireann Research. During this time he achieved a successful track record as lead researcher, and in coordinating international research projects and the transfer of research into products.

He is currently supervising 6 Phd students: Jeffrey Sardina, Matt Murtagh-White, Claire Mc Namara, Sarah Alzahrani, Ali Bandeh, Mary Sharp and co-supervising Delaram Golpayegani in TCD and Jiantao Wu in UCD.

He has supervised 25 Phd students to completion since 2006 as primary supervisor (19) or co-supervisor (6) : Albert Navarro; Alex Randles; Sinead Impey; Peru Bhardwaj, Lucy Mc Kenna; Harshvardhan Pandit; Gachpaz Hamed Roghaiyeh; Wessel Reijers; Haytham Assem; Ademar Crotti; Michael Glienecke; Alan Meehan; Brian Walsh; Hendrik Thomas; Seung-Hwa Chung; Paul Stynes; Liam Fallon; Wei Tai; Dominic Jones; Colm Conroy; Bo Fu; Aidan Boran; Song Guo; Ruairdhi Power; Karl Quinn, as well as the following 7 MSc by Research Theses completions : Rolando Hanlon, Sahil Mathur, Tewson Seeoun; Mark Stokell, Rami Shosha, Paul Mara and Austin Kenny. In addition he has supervised 65+ MSc Dissertations to date. Five researchers from his team over the year have gone onto faculty positions in other universities.
  Artificial Intelligence   DATA GOVERNANCE   Data Integration   DATA MAPPING   Knowledge Graphs   Linked Data   Semantic Interoperability   Semantic Mapping   Semantic Web
 ADAPT: SFI Research Centre for AI-Driven Digital Content Technology,
  Virtual Record Treasury of Ireland,
 Searobend, Linked Metadata for English-language texts,
 FAIRVASC, building registry interoperability to inform clinical care,

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Details Date
External Examiner for TU Shannon MSc in Applied Software Engineering (MASE) 2020-to date
Member of Ireland's Open Data Governance Board (ODGB) 2019-2023
Member of Steering Group National Open Research Forum (NORF) 2019-2023
Member of Board of Marino Institute of Education 2019-2021
Expert Reviewer for French Research Agency 2015 to date
External Examiner for WIT Postgraduate Proposal Grant Awards 2014-to date
Expert Reviewer for National Council for Scientific and Technological Development (CNPq), Brazil 2015-to date
Associate Editor of Journal of Network and Services Management 2009-to date
Associate Editor of International Journal of Network Management 2012-to date
External Examiner for MSc in Knowledge Management, Dublin Institute of Technology 2009-2012
External Examiner for BSc in Enterprise Computing, Dublin City University 2012-2016
Jiantao Wu, Jarret Pierse, Fabrazio Orlandi, Declan O'Sullivan. Soumyabrata Dev, Improving Tourism Analytics From Climate Data Using Knowledge Graphs, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing , 16, 2023, p2402 - 2412 , Journal Article, PUBLISHED  DOI  URL
Jiantao Wu, Fabrizio Orlandi, Tarek AlSkaif, Declan O'Sullivan, Soumyabrata Dev, A semantic web approach to uplift decentralized household energy data, Sustainable Energy, Grids and Networks, 32, (100891), 2022, p1-25 , Journal Article, PUBLISHED  DOI
Alex Randles, Declan O'Sullivan, John Keeney, Liam Fallon, Ontology Driven Closed Control Loop Automation, IEEE 9th International Conference on Network Softwarization (NetSoft), Madrid, Spain, 2023, pp528-533 , Conference Paper, PUBLISHED  DOI
Jiantao Wu, Conor O'Sullivan, Fabrizio Orlandi, Declan O'Sullivan, Soumyabrata Dev, Measurement of Industrial Smoke Plumes from Satellite Images, IGARSS 2023 - IEEE International Geoscience and Remote Sensing Symposium, July 2023, edited by Pasadena, CA, USA , IEEE, 2023, pp5680-5683 , Conference Paper, PUBLISHED  DOI
Karl Gisslander, Matthew Rutherford, Louis Aslett, Neil Basu, François Dradin, Lucy Hederman, Zdenka Hruskova, Dagmar Jäger, Hicham Kardaoui, Sabina Licholai, Declan O"Sullivan, Jennifer Scott, Mårten Segelmark, Richard Straka, Michelangelo Tesi, Augusto Vaglio, Arthur White, Krzysztof Wójcik, Beyza Yaman, Mark A Little, Aladdin J Mohammad*, Data quality and patient characteristics in European ANCA-associated vasculitis registries: data retrieval by federated querying, Annals of the Rheumatic Diseases, 83, (1), 2024, p112 - 120, Journal Article, PUBLISHED  DOI
Matt Murtagh-White, PJ Wall, Declan O'Sullivan, Learning from the Evidence: Impact Evaluations, Ontology and Policy, 2023 IEEE 17th International Conference on Semantic Computing (ICSC), Laguna Hills, CA, USA, 1-3 February 2023, 2023, pp104 - 106, Conference Paper, PUBLISHED  DOI  URL
Jiantao Wu, Fabrazio Orlandi, Declan O'Sullivan. Soumyabrata Dev, Ontological Modeling of Climate Data to Improve Climate Analytics., IGARSS 2023 - IEEE International Geoscience and Remote Sensing Symposium, Pasadena, CA, USA, IEEE, 2023, pp2317-2320 , Conference Paper, PUBLISHED  DOI
Sarah Alzahrani, Declan O'Sullivan, What metadata is needed for semantic and data mappings?, IEEE 10th International Workshop on Semantic Computing for Social Networks and Organization Sciences, Laguna Hills, CA, USA, 1-3 February 2023, IEEE, 2023, pp312 - 316, Conference Paper, PUBLISHED  DOI  URL
Sinead Impey, Gaye Stephens, Declan O'Sullivan, The Nurse"s Knowledge Bank: A Serious Knowledge Elicitation and Evaluation Game, Games and Learning Alliance. GALA 2023, 14475, Lecture Notes in Computer Science, Springer, 2023, pp1 - 8, Conference Paper, PUBLISHED  DOI
Jiantao Wu, Fabrizio Orlandi, Declan O'Sullivan, Soumyabrata Dev, Link climate: An interoperable knowledge graph platform for climate data, Computers & Geosciences, 2022, p104 - 105, Journal Article, PUBLISHED  DOI

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J. Keeney, D. Lynch, D. Lewis, D. O'Sullivan, On the Role of Ontological Semantics in Routing Contextual Knowledge in Highly Distributed Autonomic Systems, Department of Computer Science, Trinity College Dublin, 2006, (Technical Report (TCD-CS-2006-15)), Report, PUBLISHED


Award Date
Best Paper IEEE/IFIP Network Operations and Management Symposium (NOMS): Experience Track 2014
Best Paper: International Workshop on Privacy Engineering - IWPE'16 2016
Declan O'Sullivan and his team are developing new theoretical, conceptual and algorithmic techniques for automated data integration in dynamic environments. The integration step of the data lifecycle has typically been a labour intensive activity, with increasingly brittle results due to the dynamic nature of today's environments. A systematic mechanism for continuous data integration is lacking, but is needed to deal with the dynamism of the data (velocity, variety) and schemata characteristics of modern environments. The team has particular expertise in W3C-based Knowledge Graphs, Semantic Web and Linked Data environments.