Academic, scientific or professional interest: The dynamics of social changes that occur in complex societies directly influences the professional practice of social work. These changes have been influencing the social and economic context since the sixties and have increased the demand for more trained social workers. Some of the most important changes have been the introduction of flexible working strategies in a globalised economic environment, which has caused processes of job insecurity and vulnerability in certain groups, who often become subjects of social work intervention because of their social fragility. These groups need a comprehensive solution that promotes their integration capacity and access to the labour market. Furthermore, the significant changes in family structure have weakened its protective capacity in a social welfare system so fundamentally familialist as the Spanish state’s. The reduction of family size, the diversity of forms of cohabitation, the incorporation of women into the labour market and the high rates of aging require new networks. This complexity leads to the need for professional profiles with high degree of specialisation both in theory and practice, allowing to understand and address problems generated by an ever changing society.