By conducting a case study of two diaconal institutions, Samariterhemmet in Uppsala/Sweden and the Evangelisches Diakoniewerk Schwäbisch Hall e.V. in Germany, the thesis compares the roles of church diaconal work within the Swedish and the German welfare system. These two systems are characterised by the different roles given to independent welfare organisations. The overarching research question is if and in which way the two diaconal institutions are effected by current changes within the field of welfare and how these changes challenge them to redefine their roles. The material analysed contains written documents, interviews with selected representatives and the results of participant observation in both institutions. As changes in the roles of independent welfare organisations were expected the results are unexpected. The two diaconal institutions show considerable persistence. Neither the orientation of their fields of work nor their own definitions of their roles within the welfare system have changed during the 1990s. In addition, the study reveals that both institutions regard themselves as a critical voice within the welfare system although their welfare engagement differs considerably. The German institution is a huge welfare provider while the Swedish institution conducts targeted initiatives. The analysis of four decisions within hospital work reveals that security of planning and freedom of action motivate the institutions to undertake responsibility for social services. The study points especially to the fields of education and research helping the institutions to maintain and to develop the diaconal profile. Altogether the results underline the need for more research on the meso-level of the third sector. This would contribute to a more nuanced discussion on the future role of independent welfare organisations within the Swedish and the German welfare system.