This dissertation defense investigates the concept of entrepreneurial orientation (EO) through a phenomenological lens, focusing on the lived experiences of founder-owners of private companies. It seeks to clarify the sources, dimensions, and manifestations of EO, suggesting it is both an aspirational and dispositional phenomenon that impacts long-term business success. The study emphasizes the need for qualitative research in IO psychology to enhance understanding of EO and its practical applications in the entrepreneurial context.