How can one foster development within an organization? How can consultants and leaders shape the future of their organization? What approaches exist to address changes with the involvement of those affected? This practical handbook is based on many years of practical experience, reflections, and the authors' own developments as consultants and facilitators in internal corporate projects focused on organizational and management development. It describes systemic organizational development (OD) as a development-oriented approach to shaping and changing organizations in various contexts, characterized by sustainable implementation and design capabilities. The first part provides relevant foundational knowledge for practitioners to understand organizations and their design. In the second part, the authors describe how OD processes are conducted.