This study was undertaken to explore the role of principals in capacity development of post level one teachers for school leadership positions. The success of a school and its attendant learner achievement depends largely on good school leadership. Thus, it is highly unlikely that poor or ineffective school leadership will lead to successful schools. This study argues that it is the responsibility of principals to ensure that adequate opportunities exist for leadership development of post level one teachers. A qualitative research approach was selected to investigate the role principals play in building leadership capacity in post level one teachers. Semi-structured individual interviews were conducted with ten (10) participants at two (2) schools: one (1) principal and four (4) post level one teachers per school. Findings indicate that principals played a fundamental role, notably different, in the creation of opportunities for leadership development in post level one teachers. The opportunities ranged from the formation of committees, which offer exposure to early leadership practices, mentoring and coaching prospects and the availability of leadership training and development resulting from the outcomes of the Integrated Quality Management System appraisal system mandated by the Department of Education. Lastly, the study encapsulates these opportunities in a five-year leadership capacity building programme, to be offered as an in-service internal programme for post level one teachers to support progressive and developmental leadership capacity improvement.