Ernst & Young's knowledge management, initiated in the 1990s under Chief Knowledge Officer John Peetz, aimed to improve the firm's internal knowledge resources and was pivotal to its consulting strategy. The firm established several centers to capture, store, and disseminate knowledge, evolving from traditional methods to a more technology-driven approach with the development of the 'Ernie' online consulting service. Current challenges include measuring the effectiveness of knowledge management, fostering a culture of sharing, and enhancing global coordination within the expanding firm.