The main research question considered in the article is how to provide public administration that is sustainable, and capable of supporting its political management both in stable and in turbulent times. Within this framework, special attention is given to the performance of a state, the role of political management and public managers, challenges and trends in public service delivery, structural vs. incremental changes, and balancing the performance. In this article, we do not consider extensive public reforms per se; we focus on the sustainability of apparatus that supports the respective government and enables processes and projects of that kind. The methodology used is a combination of descriptive method, case study, and secondary analysis of empirical research conducted. Practical illustrations are provided on the case of Slovenia and in the context of the European Union. However, this article is more oriented towards future rather than the past. Therefore, the main contribution of this article is a presentation of a sustainable public administration model developed by the authoress, together with implications at organizational, national and international level. Some areas for further research are indicated.