Given the internationalization process of higher education across the globe, continuing professional development (CPD) of academic staff is vital to ensure the quality of teaching and learning. Under such scenario, the European Erasmus+ project “Educational Quality at Universities for Inclusive International Programmes” (EQUiiP) identifies the role of the internationally-oriented educational developer (ED) as crucial to higher education institutions (HEIs) and provides these institutions with the means to support academic staff and hereby enhance the quality of internationalized programs taught in international classrooms. Consequently, this chapter provides the conceptual rationale behind the EQUiiP project, delves into the needs of teacher education programs and the role played by the EDs, and describes the EQUiiP project and its outcomes by providing concrete examples of its inclusive CPD program. Finally, some implications and recommendations for teacher professional development, with specific reference to the Spanish setting, are offered.