Panagiotis is a Postdoctoral researcher at the University of Athens, where he obtained his PhD on distributed and streaming graph processing techniques. His research interests include graph mining and information retrieval, with a particular focus on mining large scale graphs and streams of social activity. His work has been published in top-tier journals and conferences in the field of data engineering and knowledge management (IEEE TKDE, CIKM, IEEE Big Data, WWWJ,  IEEE Trans. on Big Data, ICWSM, IEEE CLOUD, etc.). Moreover, Panagiotis was the recipient of the First Prize in ACM's WSDM 2012 Data Challenge with a novel graph compression approach.

Since February 2010, he is with the MADgIK Research Group at NKUA and has been involved in various EU-funded ICT Projects, including GALENA, PERNASVIP, iMarine and EarthServer.