Dimitris Karageorgiou is a research associate in the Media Analysis, Verification and Retrieval Group of the Centre for Research and Technology Hellas (CERTH). His research interests span the areas of multimedia forensics, content retrieval, artificial intelligence, and distributed software architectures. He actively participates in European research projects aiming at the development and exploitation of AI tools for countering Online Disinformation. Also, he currently leads the R&D process of the Image Verification Assistant and Near-Duplicate Detection services. He has developed innovative methods in the field of multimedia forensics and has led the design of large-scale software architectures.