This is a presentation on "Lean & Agile Organizational Leadership: History, Theory, Models, & Popular Ideas," which are emerging models for managing high-risk, time-sensitive R&D-oriented new product development (NPD) projects with demanding customers and fast-changing market conditions (at the enterprise, portfolio, and program levels). It establishes the context, provide a definition, and describe the value-system for lean and agile methods, principles, and core ideas. It provides a brief history and comparative analysis of agile methods (i.e., Crystal Methods, Scrum, Dynamic Systems Development Method, Feature Driven Development, and Extreme Programming), project management models (i.e., Radical, Adaptive, Extreme, Agile, and Simplified Agile), and portfolio frameworks (i.e., Enterprise Scrum, Scaled Agile Framework, Large Scale Scrum, Disciplined Agile Delivery, and Recipes for Agile Governance). Then it provides multiple histories of the fields of organizational leadership, administration, and management over the last 100 years. It then introduces, delves into, describes, and provides a brief survey and comparative analysis of emerging theories, models, and methods of lean and agile leadership (i.e., Agile, Employee, Radical, Lean, and Leadership 3.0). Finally, it closes with an expose of the top organizational change paradigms most closely aligned with the field of lean and agile development, project management, and portfolio management methodologies (along with a unique summary of the major tenets, principles, and practices of lean & agile organizational leadership). This briefing has been warmly received by multiple U.S. government agencies, contractors, and university audiences throughout Baltimore-Washington, DC.