This paper explores the implementation of strategic leadership in Bank Syariah Indonesia (BSI), Indonesia’s largest Islamic bank, formed through the merger of three state-owned sharia banks. As a product of financial consolidation within the Islamic banking sector, BSI provides a significant case study on how strategic leadership plays a vital role in institutional integration, vision execution, and value-based management. The study employs a qualitative descriptive approach using secondary data sources such as corporate reports, regulatory publications, and previous studies. Findings indicate that BSI's strategic leadership involves not only the formulation and communication of vision but also the orchestration of cultural alignment, stakeholder trust-building, innovation, and compliance with sharia principles. The study concludes that strategic leadership is not only a managerial function but a transformative force in shaping BSI’s institutional identity and long-term sustainability within Indonesia’s Islamic financial ecosystem.