The relevance of this study stems from the need to integrate international standards into the public administration system of the Republic of Kazakhstan, particularly in the context of globalisation, the shifting political and economic landscape, and the imperative of sustainable governance. The aim of the research is to analyse the process of adapting international standards within Kazakhstan’s civil service system, with particular emphasis on the recommendations of the Organisation for Economic Co-operation and Development (OECD) and their influence on sustainability in public institutions. The research methodology includes a comprehensive analysis of national and international practices, employing historical and comparative approaches to identify best practices for integrating global experience into Kazakhstan’s administrative system. The findings indicate that the implementation of international standards contributes to the development of a sustainable organisational culture, the strengthening of ethical norms, and enhanced governance efficiency. The conclusions of the study include proposals for legislative updates in Kazakhstan, enhancement of public service ethics standards, and institutional mechanisms that support sustainable administrative transformation and ethical continuity.