This chapter overviews the knowledge management (KM) history, strategy and practice at The MITRE Corporation. A non-profit organization working in the public interest in the domains of national security, aviation, and tax administration, MITRE has inculcated learning and knowledge sharing into its corporate culture. In particular, the chapter describes MITRE’s KM roots, strategy, KM objectives, a chronology of KM practice, KM processes, KM repositories, communities of practice, expertise management, collaboration, return on investment, and KM benchmarks and measurement.