How to efficiently utilize the physically limited resource of spectrum has become a critical problem to solve in the 21st Century as wireless communications continues to grow exponentially, with wireless technology moving from 4G to 5G and the advent of the Internet of Things. In the US, the Federal Government is the largest single user of midband spectrum, so no serious solutions could be developed without full engagement with the FCC, DoD and NTIA. In-depth academic and industry discussions began with the Obama administration’s President’s Council of Advisors on Science and Technology, culminating in a report issued on July 20, 2012: Realizing the Full Potential of Government-Held Spectrum to Spur Economic Growth. The report concluded that the traditional practice of clearing and reallocating portions of the spectrum used by Federal agencies was not a sustainable model for spectrum policy, recommending that the best way to increase capacity was to leverage new technologies that enable large blocks of spectrum to be shared. In 2015 this led to the FCC adopting new rules for sharing spectrum in the 3.5 GHz band, naming the band Citizens Broadband Radio Service. Professor Reed was on the ground floor of turning the academic concept into an industry reality with the founding of Federated Wireless, laying the groundwork for developing one of the first Spectrum Access Systems that dynamically shares spectrum in real-time. Kurt Schaubach picked up the reigns at Federated Wireless, shepherding the product through the FCC/NTIA certification process and commercially launching the service in September 2019. Professor Reed and Mr. Schaubach will talk about this history and the lessons learned from government, academia and industry working together to solve an issue that goes beyond technology alone. Mr. Schaubach will also discuss the commercial success of CBRS and review how it has led to the global exploration of spectrum sharing as a viable and necessary option for efficient spectrum utilization. Both will discuss how the commercial opportunities for spectrum sharing may evolve over time.