In this study, we aimed to develop and test the effectiveness of a training programme to foster teachers' competencies in the provision of career development learning (CDL) programmes for children. Forty-eight middle school teachers working with socioeconomically disadvantaged students in Eastern Turkey participated in the study. The Wilcoxon Signed Rank Test indicated the positive effects of the training on the teachers' efficacy in providing career education but no significant effect on the teachers' communication skills . The qualitative results addressed the improvements made in teachers' professional and personal development, and perceived self-efficacy in providing career programmes. The results revealed the need for upskilling of teachers to improve their facilitation of CDL for students and to support their own professional development.