- May 2023: `Basic Algorithms in Graphs: Properties and Applications’, IEEExtreme Algoday Webinar, NTUA, UPatras and Thessaly-Lamia Student Branch.
- December 2021: `Scheduling and Graph Exploration with Deadlines’, Laboratoire d'Informatique et de Systèmes (LIS), Marseille, France.
- November 2021: `Exploring Graphs with Time Constraints by Mobile Robots’, University of Ioannina, Ioannina, Greece.
- April 2021: `An Introduction to Distributed Computing’, SFHMMY 12, Aristotle University of Thessaloniki, Greece.
- September 2019: 'Exploring Graphs with Time Constraints by Unreliable Collections of Mobile Robots’, Universita Ca 'Foscari Venezia, Venice, Italy.
- December 2017: 'Exclusive Graph Searching in Various Graph Classes’, Universita Ca 'Foscari Venezia, Venice, Italy.
- October 2015: 'Mobile Agents Rendezvous in Mesh-Networks, in spite of a Malicious Agent’, 7th Workshop on Graph Searching, Theory and Applications + 6th Workshop on Moving and Computing, Universite de Montreal, Montreal, Canada.
- April 2014: ‘Exclusive Graph Searching in Various Graph Classes’, 6th Workshop on Graph Searching, Theory and Applications, Cargese, Corsica, France.
- October 2013: `Distributed Computing: An algorithmic theory framework for mobile agents and some interesting problems', Universita Ca' Foscari Venezia, Venice, Italy.
- July 2013: `Exploration of Networks Containing Malicious Hosts', Moving and Computing: Research Meeting and School on Distributed Computing by Mobile Robots, Ischia, Italy.
- June 2013: `Exploration of Networks Containing Malicious Hosts', TRANSFORM Summer School on Research Directions in Distributed Computing, FORTH-ICS, Heraklion, Greece.
- March 2013: `Online Graph Exploration by a Mobile Agent', COATI project, INRIA, Sophia-Antipolis, France.
- August 2012: `Online Graph Exploration with Advice', 7th Athens Colloquium on Algorithms and Complexity, University of Athens.
- November 2011: `Gathering Asynchronous Oblivious Mobile Robots in a Ring', Laboratoire d'Informatique Fondamentale de Marseille (LIF), Marseille, France.
- October 2011: `Black Hole Search with Finite Automata Scattered in Synchronous Rings and Tori', Comenius University, Bratislava, Slovakia.
- August 2010: `Deterministic Algorithms for the Rendezvous problem in Networks', Moving and Computing: Research Meeting and School on Distributed Computing by Mobile Robots, Carleton University, Ottawa, ON, Canada.
- February 2009: `Connectivity in Ad-Hoc Networks with Selfish Nodes', Comenius University, Bratislava, Slovakia.
- August 2007: `Connectivity in Ad-Hoc Networks with Selfish Users', 2nd Athens Colloquium on Algorithms and Complexity, National Technical University of Athens.
- August 2006: `Mobile Agent Rendezvous in Graphs', 1st Athens Colloquium on Algorithms and Complexity, National Technical University of Athens.
- April 2005: `Searching for a black hole in (semi-) synchronous networks', Carleton University, Ottawa, Canada.
- November 2004: `Exploration of graphs under different scenarios', MASCOTTE project, INRIA, Sophia-Antipolis, France.