This study analyzed the case of DYB Education, a comprehensive education group based on the management philosophy, “People are the system”, by utilizing the organizational life cycle model. DYB Education is a company offering specialized English education to a broad range of customers from preschoolers to adults with a focus on middle school students. Founded in 1993, it has recorded steady growth to become an education group with an unrivalled position in the market today. Initially launched as Choisun Language Institute, DYB Education concentrated on providing quality education services since its inception and as a result, it has developed a system and educational capacity to compete in the global education market. The key success factors behind DYB Education are the expertise of its CEO Song Oh-hyun and servant leadership. Song developed the education program for DYB based on experiences he himself accumulated for more than twenty years as an English education expert and ensured that programs of identical quality were provided in its campuses located in different regions. He acted as a model educator and entrepreneur through servant leadership and composed an organization that could realize his value-based management and education philosophies, thereby achieving corporate success. Transparent communication and a corporate culture based on Song’s human- centered philosophy also acted as success factors. The core capacity of DYB lies in its unmatched education program, talented teachers, and a well-established system. DYB Education strives to ensure quality education through its remarkable education capacity and systemized education, management, and learning systems to effectively manage talented and dedicated teachers. It endeavors to fulfill its mandate in education by taking responsibility for its teachers and towards its students and their parents by adhering to a direct management system where not only the main campus but also its numerous campuses are managed comprehensively. This study aims to examine the growth of DYB Education and identify its core capacity and success factors in order to provide an insight to companies striving to grow into leading companies based on strong leadership and corporate culture.