Rodrigo Costas is a senior researcher at the Centre for Science and Technology Studies (CWTS) at Leiden University (the Netherlands). Rodrigo is also an Extraordinary Associate Professor at the Centre for Research on Evaluation, Science and Technology (CREST) of Stellenbosch University (South Africa). He holds a PhD in Library and Information Science from the CSIC in Spain. His areas of expertise include the fields of information science, scientometrics, and social media metrics. His work focuses on developing new theoretical and analytical approaches to understand the interactions between science and society. Some of his research topics include the development of novel scientometric approaches to study the global academic workforce, particularly the mobility flows of scientific researchers, and the study of funding acknowledgments. In addition to his research activities, Rodrigo is also involved in several European and international research projects, and he is a member of the CWTS UNESCO Chair on Diversity and Inclusion in Global Science. He is also an Associate Editor of the journal Quantitative Science Studies.