This book offers a collection of conversation analytic investigations into how one US-based philanthropic organization communicates its mission of improving public health. In contrast to political speeches or news interviews with prominent figures, much communication with the public involves the routine work undertaken by institutional representatives as they interact with external audiences: this book considers precisely how this work is accomplished. Communicating with the Public broadens the scope of conversation analysis by unveiling the interactive, multi-party, and multi-modal nature of institutional messaging that might otherwise be construed as a scripted, monologic undertaking. To this end, it examines a diverse array of contemporary platforms, including webinars, podcasts, and television interviews, as well as face-to-face conversations following public talks and panel discussions. Chapters reveal how both foundation representatives and their interlocutors target messaging to specific audiences that may or may not be present, manage the logistics of delivering this messaging, and position themselves as credible experts or a unified institutional collective.