Public procurement is one of the main tools that States rely upon for policymaking. Public spending managed through public procurement plays an important role in fostering the national economy and promoting human and physical capital formation. Furthermore, it is instrumental in distributing resources and opportunities within societies. In recent years, the Colombian public procurement system has undergone drastic modification aimed at improving transparency, accountability and participation. Recommendations and standards have been provided by international bodies such as the OECD, which has also supported policy design, development and implementation in the context of Colombia’s admission procedures. Against this backdrop, this paper examines the role of the OECD in the production of national public procurement regulations, the mechanisms through which this agency interacts with local legal arrangements, the difficulties of the process and progress made.