For over two decades, organizations globally have leveraged shared services to optimize processes, enhance controls, and reduce costs. While these benefits remain relevant, the expectations for leading Global Business Services (GBS) organizations have significantly increased. Mature GBS organizations now provide strategic value in specialized areas such as tax compliance, statutory reporting, project controlling, and credit management; alongside strategic initiatives in project-based operations, change management, and innovation, beyond traditional cost and operational efficiency gains. Consequently, key stakeholders and business partners perceive GBS as a strategic ally rather than merely a transactional processing center. With the maturation of GBS, the Partnering Operating Model is becoming increasingly strategic.