Abstract. In this paper we report on our experience on using the socalled model-driven security approach in an MDA industrial project. In model-driven security, "designers specify system models along with their security requirements and use tools to automatically generate system architectures from the models." Our report includes a discussion of the languages that we used to model both the functional and the security system's requirements, as well as a description of the transformation function that we developed to build from the security-design models the system's access control infrastructure. The report concludes with the lessons about the feasibility and practical industrial relevance of the model-driven security approach that we learned from this experience.