The article presents the evaluation of the training programme for secondary school principals conducted in the period between 2006 and 2009. A mixed method approach was used to conduct the summative evaluation with 28 graduate participants. For the impact evaluation, 15 of the graduates were interviewed three years after the programme was completed. The quantitative data was analyzed using means and standard deviation. The findings revealed that participants gained technical and relational skills but responses were less favourable in relation to cognitive or conceptual skills, while the support from lecturers and workplaces was strong but less favourable from the central ministry. There was a positive impact on participants' performance during the period of training, especially in the areas of confidence, collegiality and overall leadership. For the impact evaluation, graduates credited the programme for their promotion to become principals, vice principals, senior teachers or give added responsibilities. They identified areas to be enhanced for any further programme to include school law, financial management, policy development and interpretation, and conflict management and relational skills. The main recommendation is that for any further programme for the training of principals should be guided by the findings of the evaluation. (Contains 7 tables and 1 figure.)