Abstract
This study investigated how organisational culture influences innovation in project-based non-profit organisations (NPOs) in South Africa, with a focus on the mediating role of knowledge sharing. Drawing on the Resource-Based View (RBV) and the Knowledge-Based View (KBV), the research conceptualised organisational culture as a strategic resource and knowledge sharing as a dynamic capability that enables innovative behaviours. Using a cross-sectional survey of 253 employees across multiple NPOs within the Solidarity Movement, South Africa, quantitative analyses revealed that organisational culture significantly enhanced both knowledge sharing and innovation. Furthermore, knowledge sharing partially mediated the relationship between organisational culture and innovation, underscoring its role as a critical mechanism for translating cultural values into creative outcomes. Findings provide both theoretical and practical insights into fostering innovation through organisational culture and knowledge management in resource-constrained, project-driven environments.