- Workshop and Tutorial Chair of 13th International Conference on Semantic Systems (SEMANTiCS'17), 11-14 September 2017, Amsterdam, Netherlands.
- Organisation Committee Member of Tourism Fast Forward'17, 30-31 May 2017, Mayrhofen, Austria.
- Jury and co-organiser of eTourism Hackathon Seefeld, 5-6 April 2017, Seefeld, Austria.
- Co-chair of the 5th workshop on Methods, Evaluation, Tools and Applications for the Creation and Consumption of Structured Data for the e-Society (META4eS), Part of the OnTheMove Conferences & Workshops, 24 October 2016, Rhodes, Greece.
- Research and Innovation Track Chair (aka PC Chair), Senior Program Committee Member of 12th International Conference on Semantic Systems (SEMANTiCS'16), 12-15 September 2016, Leipzig, Germany.
- Organisation Committee Member and Semantic Session Track Chair of Tourism Fast Forward'16, 28-29 April 2016, Mayrhofen, Austria.
- Co-chair of the 4th
workshop on Methods, Evaluation, Tools and Applications for the
Creation and Consumption of Structured Data for the e-Society (META4eS), Part of the OnTheMove Conferences & Workshops, 26-30 October 2015, Rhodes, Greece.
- Satellite Events Chair, Senior Program Committee Member of 11th International Conference on Semantic Systems (SEMANTiCS'15), 15-18 September 2015, Vienna, Austria.
- Organisation Committee Member of Tourism Fast Forward'15, 16-17 April 2015, Mayrhofen, Austria.
- Co-chair of the 3rd workshop on Methods, Evaluation, Tools and Applications for the Creation and Consumption of Structured Data for the e-Society (META4eS), Part of the OnTheMove Conferences & Workshops, 27-31 October 2014, Amantea, Italy.
- Co-chair of the 2nd workshop on Methods, Evaluation, Tools and Applications for the Creation and Consumption of Structured Data for the
e-Society (META4eS), Part of the OnTheMove Conferences & Workshops, 9-13 September 2013, Graz, Austria. - Co-chair of the workshop on Methods, Evaluation, Tools and Applications for the Creation and Consumption of Structured Data for the e-Society (META4eS), Part of the OnTheMove Conferences & Workshops, 10-14 September 2012, Rome, Italy.
- Track Chair of "Semantic Web and Internet Applications" main paper area at The 14th International Conference on Network-Based Information Systems (NBiS 2011), September 7-9, 2011, Tirana, Albania.
- Sponsorship Chair, Program Committee Member of "Social Web and Web Science" main paper track at 8th Extended Semantic Web Conference (ESWC'11), 29 May - June 4, 2011, Heraklion, Greece.
- Workshops Co-chair of FIS 2010: 3rd Future Internet Symposium, 20-22 September 2010, Berlin, Germany.
- Tutorials Co-Chair, Social Web main paper track, Poster and Demo track Program Committee Member of 7th Extended Semantic Web Conference (ESWC'10), 30 May - June 3, 2010, Heraklion, Greece.
- Organising Committee Member of 3rd International ExpertFinder Workshop: Personal Identification and Collaborations - Knowledge
Mediation and Extraction (PICKME'08), a workshop in
association with International Semantic Web Conference 2008 (ISWC'08),
27 October 2008, Karlsruhe, Germany.
- Poster and Demo Track Chair and Program Committee Member of FIS 2008: Future Internet Symposium, 28-30 September 2008, Vienna, Austria.
- Organising Committee Member of Finding Experts on the Web with Semantics, a workshop in
association with International Semantic Web Conference 2007 (ISWC'07),
12 November 2007, Busan, Korea.
- Organising Committee Member of Conference on Social Semantic Web (CSSW), SABRE sub-conference,
24-28 September 2007, Leipzig, Germany.
- Organising Committee and Program Committee Member of CAPS 2007: Third Workshop on
Context Awareness for Proactive Systems, 18-19 June 2007, Guildford, UK.
- Organising Committee Member of 1st International ExpertFinder Workshop, 16 January 2007, Berlin, Germany.
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