The professional capacity of managers has always been a crucial factor in enhancing the efficiency and effectiveness of any organization. In the education sector, the education managers working at different administrative levels are responsible for the planning and management of educational institutions toward achieving the goals of the education sector. This article attempts to explore the capacity-building needs of the heads of Islamabad Model Schools in the context of their job requirements. Data were collected from 50 head teachers of Islamabad Model Schools through questionnaires and focus group discussions. In Islamabad Capital Territory, there is no education management cadre; therefore teachers are appointed as head of schools by virtue of their seniority. These heads usually lack the required management skills to manage an educational institution. Moreover, there are no arrangements for building the capacity of these newly appointed school heads to run these institutions. While managing the educational institutions, head teachers have to perform various important functions for which they need managerial skills. It has been discovered that head teachers needed training in different areas of management, including financial management, office management, personnel management, school improvement, planning, community participation, and computer literacy. The head teachers of Islamabad Model Schools need service management training in various areas of management to enhance the knowledge and skills they need to run educational institutions efficiently and effectively.