This Book provides an overview of empirical research examining the correlation between management styles and organizational performance, focusing on international non-government organizations (INGOs). The review explores the impact of organizational management on INGO performance, the influence of management on overall organizational performance, and the effects of management styles on Humanitarian Non-Governmental Organizations (NGOs). Employee engagement is a key driver of organizational effectiveness and performance. Employees need to have a sense of belonging and share in the organization vision and then enable an employee to find their role in the organization.Talent management includes all talent processes needed to optimise people within an organization. The processes include talent planning, recruitment, development, performance management, rewards and compensation, employee empowerment, employee engagement and employee retention.