He is a researcher at INESC-ID in the Distributed Systems Group (GSD). He is currently the coordinator of the Master Degree (MSc) in Information Systems and Computer Engineering. He has a PhD in Computer Science from the University of Lisboa Faculty of Sciences. He has been involved in several international and national research projects related to intrusion tolerance and security, including the SafeCloud, PCAS, TCLOUDS, ReSIST, CRUTIAL, and MAFTIA European projects. He has more than 100 publications and is Senior Member of the IEEE. His main research interests are: security, intrusion tolerance, distributed systems, distributed algorithms, computer networks, cloud computing, and critical infrastructure protection.