2016 invited speaker, Predicting Failures in the Cloud, Oracle Cloud Day, Brugg (Switzerland)

2016 invited speaker, Towards Self-Healing Cloud, IBM Interconnect, Las Vegas (US)

2015 keynote, Towards Cost-Effective Oracles, 10th IEEE/ACM International Workshop on Automation of Software Test (AST), Cape Town (South Africa)

2014 International Symposium for Search-based Software Engineering (SSBSE), Fortaleza (Brazil)

2013 International Conference on Quality Software (QSIC), Nanjing (China)

2012 International Conference on Software Maintenance (ICSM), Riva del Garda (Italy)

2011 Software Quality Days, Vienna (Austria)

2011 International workshop on Graph Transformation and Visual Modelling Techniques (GT- VMT), Saarbrücken (Germany)

2010 Brazilian Workshop on Model-Driven Software Development, Salvador (Brazil)

2010 International Workshop on Principles of Engineering Service-Oriented Systems (PESOS) Cape Town, South Africa, held in conjunction with ICSE.

2010 Emerging Faculty Symposium of the International Conference on Software Engineering Cape Town, South Africa, held in conjunction with ICSE.

2008 CEE-SET 3rd IFIP TC2 Central and East European Conference on Software Engineering Techniques, Brno, Czech Republic.

2007 International Workshop on Web quality, Verification and Validation, Como, Italy, held in conjunction with the International Conference on Web Engineering (ICWE 2007).

2007 Keynote, Towards Self-Managed Services,Workshop on Web quality, Verification and Validation (WQVV), Como (Italy)

2005 invited speaker, Quality Challenges in Ubiquitous Heterogeneous Systems, 20th anniversary of TAPSOFT, Berlin (Germany)

2000 Keynote, Engineering Software for the Net,Electronics & Information and Communication Engineers Network Software Workshop Tokyo, (Japan)

2000 Keynote, Can Graph Grammars Make Formal Methods More Human,Workshop on Graph Transformations and Visual Modeling Techniques (GT-VMT), Ginevra (Switzerland)