The aim of this chapter is to give a comprehensive framework through integrating the modern and post-modern leadership approaches in times of crises. The COVID-19 pandemic has led to great challenges worldwide. Organizing in times of crisis or crisis management has gained greater attention much more than before. Pandemic new workforce created new perspectives on the basis of leadership. This study provides detailed information about both modern leadership types as autocratic, democratic, laissez-faire, charismatic, transformational, transactional, and post-modern leadership types as spiritual, resonant, agile, relational social constructionist, and hybrid. In chaotic and uncertain environment, the leadership types and their effectiveness are analyzed and discussed at the heart of social exchange, social identity, leader-member exchange, self-determination, and complexity leadership theoretical point of views and related empirical findings.