The recognition of tensions, contradictions and paradoxes in theory, research, and practice within organizations is important for sustainable Organization Development and Change (OD&C). The extent to which organizations (public, private, and the third sector) currently have adequately come to terms with such complexity still remains open to discussion. The wicked problem construct (WPC) is a concept, process and a framework that can be used in identifying the reasons for these tensions and contradictions, explaining how they can be managed, and pointing out the limits they create for what is needed for organizational change and effectiveness. This paper examines the conceptual literature on ‘Wicked Problems’, identifying the critical dimensions of the proposed construct, and exploring the lack of attention to non-linear epistemology of practice of OD&C. The challenges of traditional OD approaches to address complexity and to increase effectiveness in dealing with wicked problems are explained.The implication for practice of the WPC as an OD&C framework for organizational effectiveness in public, private, and the third sectors is described.