His research interests are focused on machine learning (artificial intelligence) and data mining. He is mainly involved in the study of temporal mining, social network analysis, network medicine, and semantics-aware recommender systems. He published in top-tier conferences and journals, especially in the field of event detection and semantic recommender systems (IJCAI, CL, DMDK). He is co-organizer of several dedicated international workshops, in conjunction to top-tier conferences, like ICDM, CIKM, and ECIR. He has also been editor and reviewer in top-tier journals, such as TITS, TKDE, DMKD, AI, KAIS, AIIM. In 2014, he was a visiting researcher at Yahoo! Lab in Barcelona.