Cyberinfrastructure (CI) is a critical component of NSF facilities. As this CI grows in scale and complexity, it is essential for the facilities and CI communities collectively explore how to most effectively provide and sustain its essential components and services to meet current and future needs. This proposal request funds to support the 2017 NSF Large Facilities Cyberinfrastructure Workshop on September 6 and 7, in Alexandria, VA. The overarching goal of this activity is to enable direct and synergistic interactions among the NSF large facilities and the Cyberinfrastructure (CI) communities to jointly address the CI needs and sustainability of existing and future large facilities. We aim to achieve this by developing a common understanding of the current and evolving requirements, architectures and best practices, enabling technologies, operation practices and experiences, and issues and gaps.