César Alfaro is M.Ss. in Computer Engineering (URJC, 2007) and Ph.D. in Computer Science (URJC, 2013). He is currently working as assistant professor in the Computer Science and Statistics Department at Rey Juan Carlos University. He worked as researcher at Royal Academy of Science on the project “Metodología para la gestión de riesgos en seguridad operacional en vuelo a nivel estatal” supported by the Spanish Aviation Safety Agency (AESA). The aim of this work was the development of mathematical models to support the implementation of the PASO (Aviation Safety Action Plan, Plan de Acción de Seguridad Operacional) and the PESO (State Safety Program, Programa Estatal de Seguridad Operacional). He also worked in the develop of an IT tool, called RIMAS (RIsk Management in Aviation Safety), for supporting the proposed methodology for prediction of occurrences, consequences assesment by using maps and risk matrices and the optimal allocation of resources. His research focuses on electronic participation, sentiment analysis, opinions mining and risk analysis and its applications.