2020, International Conference on Cloud Computing and Services Science (CLOSER 2020), Prague, Czech Republic.

2020, International Computer Programming Education Conference (ICPEC 2020), Vila do Conde, Portugal.

2019, Symposium on Languages, Applications and Technologies (SLATE 2017), Coimbra, Portugal.

2018, Symposium on Languages, Applications and Technologies (SLATE 2017), Guimarães, Portugal.

2017, Workshop on Gamification Software for Education and Enterprises (FedCSIS 2017), Prague, Czech Republic.

2017, Digital Enterprise Computing 2017 (DEC 2017), Herman Hollerith Lehr- und Forschungszentrum (HHZ), Böblingen, Germany. Program Chair Cognitive Computing Track.

2017, Symposium on Languages, Applications and Technologies (SLATE 2017), Porto, Portugal.

2017, Workshop Industrial Applications of Artificial Intelligence (IAAI 2017), Stuttgart, Germany. Program Chair.

2016, International Conference on Emerging Networks and Systems Intelligence (EMERGING 2016), Porto, Portugal.

2016, International Conference on Ambient Computing, Applications, Services and Technologies (AMBIENT 2016), Venice, Italy.

2016, Symposium on Languages, Applications and Technologies (SLATE 2016), Maribor, Slovenia.

2016, International Conference on Cloud Computing and Services Science (CLOSER 2016), Rome, Italy.

2016, Praxisforum at Modellierung (Modellierung 2016), Karlsruhe, Germany. Program Chair.

2016, Editorial Advisory Board of the book “Gamification-Based E-Learning Strategies for Computer Programming Education” to be published by IGI Global.

2015, International Conference on Cloud Computing and Services Science (CLOSER 2015), Lisbon, Portugal.

2015, Symposium on Languages, Applications and Technologies (SLATE 2015), Madrid, Spain.

2015, International Conference on Cloud Computing, Grids, and Virtualization (CLOUD COMPUTING 2014), Nice, France.

2014, GI Workshop Technologien zur Analyse und Steuerung komplexer cyber-physischer Systeme (CPSData 2014), Stuttgart, Deutschland.

2014, Informatiktage (INFORMATIKTAGE 2014), Potsdam, Germany.

2014, Innovative Teaching Strategies and New Learning Paradigms in Computer Programming, IGI GLOBAL (editorial advisory board).

2014, Symposium on Languages, Applications and Technologies (SLATE 2014), Braga, Portugal.

2014, International Conference on Cloud Computing and Services Science (CLOSER 2014), Barcelona, Spain.

2014, International Conference on Cloud Computing, Grids, and Virtualization (CLOUD COMPUTING 2014), Barcelona, Spain.

2013, Symposium on Languages, Applications and Technologies (SLATE 2013), Porto, Portugal.

2013, International Conference on Ambient Computing, Applications, Services and Technologies (AMBIENT 2013), Porto, Portugal.

2013, International Conference on Ambient Systems, Networks and Technologies (ANT 2013), Halifax, Nova Scotia, Canada.

2013, International Conference on Cloud Computing and Services Science (CLOSER 2013), Aachen, Germany.

2012, Workshop on Programming the Semantic Web (PSW 2012), Boston, USA.

2012, International Conference on Ambient Systems, Networks and Technologies (ANT 2012), Niagara Falls, Ontario, Canada.

2012, Symposium on Languages, Applications and Technologies (SLATE 2012), Braga, Portugal.

2012, International Workshop on Web APIs and Services Mashups (Mashups 2012), Bertinoro, Italy.

2012, International Conference on Cloud Computing and Services Science (CLOSER 2012), Porto, Portugal.

2011, National Conference on XML and its Applications (XATA 2011), Vila do Conde, Portugal. Editorial Advisory Board of the book “Innovations in XML Applications and Metadata Management: Advancing Technologies”.

2011, International Workshop on Web APIs and Services Mashups (Mashups 2011), Lugano, Switzerland.

2011, International Conference on Cloud Computing and Services Science (CLOSER 2011), Noordwijkerhout, The Netherlands.

2010, International Workshop on Web APIs and Services Mashups (Mashups 2010), Ayia Napa, Cyprus.

2010, International Conference on Cloud Computing and Services Science (CLOSER 2010), Valencia, Spain.

2010, Workshop on Transforming and Weaving Ontologies in Model Driven Engineering (TWOMDE 2010), Malaga, Spain.

2010, International Workshop on Modeling and Visualization of XML and Semantic Web Data (MoViX 2010), Bilbao, Spain.

2010, International Workshop on Benchmarking of XML and Semantic Web Applications (BenchmarX 2010), Tsukuba, Japan.

2009, Workshop on Transforming and Weaving Ontologies in Model Driven Engineering (TWOMDE 2009), Toulouse, France.

2009, International Workshop on Schema Languages for XML (X-Schemas 2009), Riga, Latvia.

2009, International Workshop on Modeling and Visualization of XML and Semantic Web Data (MoViX 2009), Linz, Austria.

2009, International Workshop on Benchmarking of XML and Semantic Web Applications (BenchmarX 2009), Brisbane, Australia.

2008, Workshop on Transforming and Weaving Ontologies in Model Driven Engineering (TWOMDE 2008), Toulouse, France.

2006, Workshop on Meta-modeling and Ontologies (WoMM 2006), Karlsruhe, Germany.