| Fachtagung/Veranstaltung | eingeladene_r Sprecher_in | 17th Inter- national Symposium on Symbolic and Numeric Algorithms for Scientific Computing | 09/2015 |  | Dynamic Programming on Tree Decompositions in Practice. Some Lessons Learned | 
| Fachtagung/Veranstaltung | eingeladene_r Sprecher_in | 8th European Starting AI Researcher Symposium | 09/2016 |  | Keynote: Dynamic Programming on Tree Decompositions in Practice | 
| Fachtagung/Veranstaltung | eingeladene_r Sprecher_in | 4th Inte4th International Workshop on Defeasible and Ampliative Reasoningrnational Workshop on Defeasible and Ampliative Reasoning | 07/2017 |  | Keynote: Towards Preprocessing for Abstract Argumentation Frameworks | 
| Postgraduale Lehrgänge/Summer School | Sonstiges |  | 07/2013 | 07/2013 | ACAI (Advanced Courses in AI) Summer School 2013 | 
| Postgraduale Lehrgänge/Summer School | eingeladene_r Sprecher_in | Helsinki Graduate School in Computer Science and Engineering | 09/2010 | 09/2010 | Invited Lecture: "Computational Aspects of Abstract Argumentation" | 
| Wissenschaftliche Konferenz/Symposium | Sonstiges |  | 01/2011 | 05/2011 | 11th International Conference on Logic Programming and Nonmonotonic Reasoning,LPNMR 2011, Vancouver, BC, Kanada | 
| Wissenschaftliche Konferenz/Symposium | Sonstiges |  | 09/2012 | 09/2012 | 13th European Conference on Logics in Artificial Intelligence, JELIA 2012, Toulouse, France | 
| Wissenschaftliche Konferenz/Symposium | Sonstiges |  | 06/2012 | 06/2012 | 13th International Conference on Principles of Knowledge Representation and Reasoning, KR 2012, Rom, Italien | 
| Wissenschaftliche Konferenz/Symposium | Sonstiges |  | 01/2011 | 07/2011 | 22nd International Joint Conference on Artificial Intelligence, IJCAI 2011, Barcelona, Katalonien/Spanien | 
| Wissenschaftliche Konferenz/Symposium | Sonstiges |  | 01/2011 | 07/2011 | 25th Conference on Artificial Intelligence, AAAI 2011, San Francisco, California, USA | 
| Wissenschaftliche Konferenz/Symposium | Sonstiges |  | 01/2011 | 07/2011 | 27th International Conference on Logic Programming, ICLP 2011, Lexington, Kentucky, USA | 
| Wissenschaftliche Konferenz/Symposium | Sonstiges |  | 09/2012 | 09/2012 | 28th International Conference on Logic Programming, ICLP 2012, Budapest, Ungarn | 
| Wissenschaftliche Konferenz/Symposium | Sonstiges |  | 06/2012 | 06/2012 | 7th International Symposium on Foundations of Information and Knowledge Systems, FoIKS 2012, Kiel, Deutschland | 
| Wissenschaftliche Konferenz/Symposium | Organisator_in | 14th International Conference  on Principles of Knowledge Representation and Reasoning | 07/2014 | 07/2014 | Co-Organisator | 
| Wissenschaftliche Konferenz/Symposium | Organisator_in | 4th International Conference on Computational Models of Argument (COMMA 2012), Wien, September 2012. |  |  | Co-Organizer | 
| Wissenschaftliche Konferenz/Symposium | eingeladene_r Sprecher_in | 20th European Conference on Artificial Intelligence, ECAI 2012, Montpellier, Frankreich | 09/2012 | 09/2012 | Frontier-Speaker "Abstract Argumentation - All Problems Solved?" | 
| Wissenschaftliche Konferenz/Symposium | eingeladene_r Sprecher_in | Provenance Week 2014 | 07/2014 |  | Keynote: An Introduction to Abstract Argumentation | 
| Wissenschaftliche Konferenz/Symposium | Organisator_in | 14th International Workshop on Non-Monotonic Reasoning |  |  | PC-Chair | 
| Wissenschaftliche Konferenz/Symposium | Organisator_in | 14th International Workshop on Computational Logic in Multi-Agent Systems |  |  | Session-Organisor |