The purpose of this study was to lay the foundations of a conceptual model of the role dimensions of teacher leaders within the Lebanese private school context. Besides, the study aimed at distinguishing the prime architects of teacher leadership in such a context, highlighting the critical issues confronting its nourishment and development. The study was conducted in 59 schools in Beirut, Lebanon (approximately 60% of the city schools). Data was derived using a questionnaire completed by 2950 teachers, where its quantitative data was analyzed using SPSS 18.0 and its qualitative data was treated with the help of NVivo 7.0. Findings indicate that subject leaders' role is far more critical than that of school principals in inaugurating and cultivating teacher leadership. Another finding proposes that the roles attributed to teacher leaders within the Lebanese private school context match the international listing, yet additional roles are also suggested. Finally, evidence gathered indicate that teachers considered finding 'time' to practice leadership is the most crucial element for teacher leadership development in schools. This is besides securing a culture of trust and respect and where effective professional development is secured.