Administrative challenges in modern organizations includes among others the application of principles and theories to practices. The book attempts to bridge the gap between the theory and practice of administration and management in modern organizations. The work therefore covers the major theories of management. The Scientific management theory, administrative management theory Human relations theory, Leadership theory, Motivation and Decision making theories are analyzed. Principles of management such as Span of management, Delegation of authority, Hierarchy, Decentralization and Centralization were discussed in the book. The book is very relevant to Managers of organization, graduate and undergraduate students, diploma students, foreign diplomats, University administrators and the general reader.