I am assistant professor in the Computer Science Department of Federal University of Minas Gerais (UFMG). I received a Ph.D. in Computer Science from UFMG, in 2010, and my thesis received the CAPES award as the best Brazilian thesis in computer science for that year. During my Ph.D., I held research intern positions at HP Labs and MPI-SWS (Max Planck Institute for Software Systems) and, more recently, I worked two years as assistant professor on Federal University of Ouro Preto (UFOP). I am still involved in the post graduating program on UFOP. My current research plans are in the measurement, analysis, design, and evaluation of complex social systems and my main projects focus on understanding and modeling behavior in social Web systems. My work on online social networks has led to a number of important publications and widely cited papers. Recently, I was nominated a member of the Brazilian Academy of Science.