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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, Fabrizio Orlandi, Declan O'Sullivan, Soumyabrata Dev, LinkedGeoClimate: An Interoperable Platform for Climate Data Access Within Geographical Context, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 17, 2024, p10352-10366 , Journal Article, PUBLISHED  DOI  URL
Jiantao Wu, Fabrazio Orlandi, Declan O'Sullivan. Soumyabrata Dev, On the Use of Virtual Knowledge Graphs to Improve Environmental Sensor Data Accessibility, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 17, 2024, p6671-6682 , Journal Article, PUBLISHED  DOI  URL
Auto-generation of Blockchain-Based Distributed Applications Using Ontologies in, editor(s)El Madhoun, N., Dionysiou, I., Bertin, E. , Blockchain and Smart-Contract Technologies for Innovative Applications, Springer, Cham, 2024, pp217-258 , [Muhammad Uzair Qureshi, Damien Graux, Fabrizio Orlandi, Declan O'Sullivan], Book Chapter, 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
Alex Randles, Declan O'Sullivan, R2[RML]-ChatGPT Framework, Fifth International Workshop On Knowledge Graph Construction (KGC), European Semantic Web Conference, Hersonissos, Greece, May 2024, 3718, CEUR, 2024, pp1 - 15, Conference Paper, PUBLISHED  URL  URN
Jeffrey Sardina, Alok Debnath, John D. Kelleher, Declan O'Sullivan, TWIG-I: Embedding-Free Link Prediction and Cross-KG Transfer Learning using a Small Neural Architecture, SEMANTICS - 20th International Conference on Semantic Systems, Amsterdam, The Netherlands, 17 - 19 Sept 2024, 2024, pp1 - 17, Conference Paper, IN_PRESS  URL
Beyza Yaman, Lucy McKenna, Alex Randles, Lynn Kilgallon, Peter Crooks, Declan O'Sullivan, Digital Prosopography Information in Virtual Record Treasury of Ireland Knowledge Graph, First International Workshop of Semantic Digital Humanities, SemDH 2024, Hersonissos, Greece, May 2024, 2024, pp1 - 14, Conference Paper, PUBLISHED  URL
Delaram Golpayegani, Isabelle Hupont, Cecilia Panigutti, Harshvardhan J. Pandit, Sven Schade, Declan O'Sullivan, David Lewis, AI Cards: an Applied Framework for Machine-Readable Documentation of AI Systems and Their Risks Aligned with the EU AI Act, Annual Privacy Forum 2024, Sweden, 4-5 September, LNCS, Springer, 2024, pp1 - 25, Conference Paper, IN_PRESS  URL
Matt Murtagh, PJ Wall, Declan O'Sullivan, PRICER: Leveraging Few-Shot Learning with Fine-Tuned Large Language Models for Unstructured Economic Data, Second International Workshop on Semantic Technologies and Deep Learning Models for Scientific, Technical and Legal Data (SemTech4STLD), European Semantic Web Conference (ESWC), Hersonissos, Greece, May 2024, CEUR, 2024, pp26 - 36, Conference Paper, PUBLISHED  URL  URN
Jeffrey Sardina, John D. Kelleher, Declan O"Sullivan, TWIG: Towards pre-hoc Hyperparameter Optimisation and Cross-Graph Generalisation via Simulated KGE Models, IEEE 18th International Conference on Semantic Computing (ICSC), Laguna Hills, California, USA, IEEE Computer Society, 2024, pp122-129 , Conference Paper, 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


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.