Workshop Chair of the 2nd Workshop on The Combination of Symbolic and Sub-symbolic Methods and their Applications (CSSA), colocated with ECML/PKDD 2021
Workshop Co-Chair of DL4KG 2021, 3rd Workshop on Deep Learning for Knowledge Graphs 2021, co-located with ISWC 2021
Workshop Co-Chair of X-SENTIMENT, the sixth International Workshop at ESWC on eXplainable SENTIment Mining and EmotioN deTection, collocated with the Extended Semantic Web Conference, ESWC 2021
Workshop Co-Chair of L2D 2021, the First International Workshop on Enabling Data-Driven Decisions from Learning on the Web, collocated with the 14th ACM International Conference on Web Search and Data Mining (WSDM 2021)
Workshop Co-Chair of CSSA-2020, Combining Symbolic and Sub-symbolic methods and their Applications, collocated with CIKM 2020
Workshop Co-Chair of DL4KG 2020, 2nd Workshop on Deep Learning for Knowledge Graphs, collocated with the Extended Semantic Web Conference, ESWC 2020
Workshop Co-Chair of DL4KG 2019, 1st Workshop on Deep Learning for Knowledge Graphs 2019, co-located with ESWC 2019
Workshop Co-Chair of THE Workshop - 1st International Workshop on Open Problems and Emerging New Topics in Semantic Web Technology, co-located with ISWC 2018
Workshop Co-Chair of DL4KGS, 1st Workshop on Deep Learning for Knowledge Graphs and Semantic Technologies 2018
Workshop Co-Chair of LDQ 2014, International Workshop on Linked Data Quality 2014, co-located with SEMANTiCS 2014.
Workshop Co-Chair of Know@LOD 2014, 3rd Int. Workshop on Knowledge Discovery and Data Mining Meets Linked Open Data, Anissaras/Hersonissou, Crete, Greece.
Workshop Co-Chair of Know@LOD 2013, 2nd Int. Workshop on Knowledge Discovery and Data Mining Meets Linked Open Data, Montpellier, France.
Workshops Co-Chair of ISM 2012, IEEE International Symposium on Multimedia, Irvine, CA (USA), December 10-12, 2012.
Program Co-Chair of MTEL 2011, 6th IEEE International Workshop on Multimedia Technologies for E-Learning, in conjunction with the IEEE International Symposium on Multimedia 2011 (ISM2011) December 5-7, 2011, Dana Point, CA, USA.
Program Co-Chair of TIR '07 , 4th International Workshop on Text-based Information Retrieval, in conjunction with DEXA 2007, 3-7 September 2007, Regensburg, Germany.
Q4APS 2016, Question Answering And Activity Analysis in Participatory Sites Workshop 2016, co-located with WWW 2016
SumPre 2016, 2nd Int. Workshop on Summarizing and Presenting Entities and Ontologies 2016, co-located with ESWC 2016
VOILA 2016, 2nd International Workshop on Visualization and Interaction for Ontologies and Linked Data, co-located with ISWC 2016
AAAI 2015, 29th AAAI Conference on Artificial Intelligence 2015, Jan 25-29, 2015, Austin Texas, USA.
ISWC 2015, - 14th International Semantic Web Conference 2015, Bethlehem, Pennsylvania, USA, October 11-15, 2015.
COLD 2015, 6th International Workshop on Consuming Linked Data 2015, co-located with ISWC 2015, Bethlehem, Pennsylvania, USA, October 11, 2015.
NLP & DBPedia 2015 - Workshop on Free, Open, Interoperable NLP for DBpedia and DBpedia for NLP, co-located with ISWC 2015, Bethlehem, Pennsylvania, USA, 11. Oct 2015.
VOILA 2015, 1st International Workshop on Visualizations and User Interfaces for Ontologies and Linked Data, co-located with ISWC 2015, Bethlehem, Pennsylvania, USA, 11. Oct 2015.
K-CAP 2015, 8th International Conference on Knowledge Capture 2015, Oct 7-10, Palisades NY, USA.
TIR`15, 12th International Workshop on Text-Based Information Retrieval, in conjunction with the DEXA 2015, 26th International Conference on Database and Expert Systems Applications, Sep 1-4, 2015, Valencia, Spain.
FOMI 2015, 7th Workshop on Formal Ontologies meet Industry 2015, Aug 5, 2015, Berlin, Germany.
SumPre2015, 1st International Workshop on Summarizing and Presenting Entities and Ontologies, in conjunction with ESWC 2015, June 1, 2015, Potoroz, Slovenia.
LDOW 2015, 8th Workshop on Linked Data on the Web 2015, in conjunction with WWW 2015, May 19, 2015, Florence, Italy.
LIME 2015, 3rd International Workshop on Linked Media, in conjunction with WWW 2015, May 18, 2015, Florence, Italy.
ICWE-DC 2011, Doctoral Consortium at the 11th International Conference on Web Engineering (ICWE 2011), Paphos, Cyprus, 20-24 June 2011.
I2CS 2011, 11th Int. Conference on Innovative Internet Community Services, Berlin, Germany, 15-17 June 2011.
i-Semantics 2011, International Conference on Semantic Systems, Messe Congress Graz, Austria, 7–9 September 2011.
K-CAP 2011, 6th International Conference on Knowledge Capture 2011, in cooperation with AAAI 2011, Banff, Alberta, Canada, 25-27 June, 2011.
VISSW 2011, Visual Interfaces to the Social and Semantic Web, in conjunction with the International Conference on Intelligent User Interfaces (IUI 2011), Palo Alto, CA, USA, 13 Feb 2011.
MUSE 2010, Mining Ubiquituous and Social Environments, Workshop co-located with the 21st European Conference on Machine Learning / 14th European Conference on Principles and Practice of Knowledge Discovery in Databases (ECML/PKDD) 2010, September 20, 2010 - Barcelona, Spain.
i-Semantics 2010, International Conference on Semantic Systems, Messe Congress Graz, Austria, 1–3 September 2010.
GMW 2010, 15. Jahrestagung der Gesellschaft für Medien in der Wissenschaft (GMW), Digitale Medien für Lehre und Forschung, Zürich, Schweiz, 13.-15. September 2010.
I2CS 2010, 10th Int. Workshop on Innovative Internet Community Systems, Eastin Hotel, Bankog, Thailand, June 3-5, 2010.
ESWC 2010, Extended Semantic Web Conference, Semantic Web In-Use Track + Ontologies and Reasoning Track, Heraklion, Greece, May 30 - June 3rd, 2010.
VISSW 2010, Int. Workshop on Visual interfaces to the Social and Semantic Web, in conjunction with the International Conference on Intelligent User Interfaces (IUI 2010), Hong Kong, 7th February 2010.
SOFSEM 2010, 36th Int. Conference on Current Trends in Theory and Practice of Computer Science, Hotel Bedrochov, Spindleruv Mlyn, Czech Republic, January 23-29, 2010.
SAAKM 2009, Semantic Authoring, Annotation, and Knowledge Markup Workshop, co-located with the 5th International Conference on Knowledge Capture (K-Cap 2009), Redondo Beach, California, USA, Canada September 1 2009.
ICIP 2009, IEEE International Conference on Image Processing, Cairo, Egypt, Nov. 7-11, 2009.
SFSW 2009, 5th Workshop on Scripting and Development for the Semantic Web, in conjunction with the 6th Annual European Semantic Web Conference (ESWC2009), May 31 - June 4, 2009, Heraklion, Greece.
E-Learning 2009, 7. e-Learning Fachtagung Informatik der Gesellschaft für Informatik (DeLFI2009) und 14. Europäische Jahrestagung der Gesellschaft für Medien in der Wissenschaft (GMW2009), September, 14-17, 2009, Freie Universität Berlin (Germany).
K-CAP 2009, 5th International Conference on Knowledge Capture, September 1-4, 2009, in Redondo Beach, California, USA.
I2CS 2009, 9th Int. Workshop on Innovative Internet Community Systems, June 15-17, 2009, Jena, Germany.
SAMT 2008, 3rd Int. Conf. on Semantic and Digital Media Technologies, December, 3-5, 2008, Koblenz, Germany.
SAAKM 2008, Semantic Authoring, Annotation, and Knowledge Markup Workshop, co-located with the EKAW 2008 - 16th International Conference on Knowledge Engineering and Knowledge Management Knowledge Patterns, September 28th, 2008, Acitrezza, Catania, Italy.
ESOE 2007, Int. Workshop on Emergent Semantics and Ontology Evolution, co-located with Int. Conference on Semantic Web (ISWC 2007), November 12th, 2007, Busan, Korea.
SAAKM 2007, Semantic Authoring, Annotation, and Knowledge Markup Workshop, co-located with the 4th. Int. Conference on Knowledge Capture 2007 (KCap-2007), October 28-31th, 2007, Whistler, British Columbia, Canada.
CSSW 2007, Conference on Social Semantic Web, in conjunction with SABRE 2007 Conference on Software, Agents and Services for Business, Research, and E-Science, September 26-28th, Leipzig (Germany).
08. Feb 2011: Harald Sack, "IPv6 jetzt!", Keynote for Workshop zum Übergang zu IPv6 bei der Internetadressierung, Feburary 8th, 2011, Bundesministerium für Wirtschaft und Technologie, Berlin.
07. Feb 2011: Harald Sack, "Semantik - Die nächste Herausforderungen für Anwendungen in der IT", Invited Lecture for HPI Academy, Feburary 7th, 2011, Hasso Plattner-Institute for IT Systems Engineering, Potsdam.
02. Dec 2010: Harald Sack, "Explorative und semantische Suche mit Mediaglobe", Invited talk for IRT-Symposium "Vom Suchen zum Finden - in multimedialen Archiven der nächsten Generation", December 1-2, 2010, Institut für Rundfunktechnik, München.
08. Sept 2010:Harald Sack, "Semantic Web - Vom WWW zum Web of Data", Invited lecture for Workshop 'Future Internet: Web 3.0 - Social, Service, Semantic Web' im Rahmen des7. Fernausbildungskongresses 2010 der Bundeswehr,7.-9. Sept. 2010, Helmut-Schmidt-Universität / Universität der Bundeswehr, Hamburg.
Advisory Board Member, LabEx UCN@Sophia – Laboratory of Excellence “User-Centric Networking” funded by the French Ministry of Research, with University of Nice Sophia Antipolis, CNRS, Inria and EURECOM (2012 - 2019)