This article presents an observational case study of a U.S. Army Corps of Engineers Resource Manager working with community members through a contested project. Using the Aristotelian concepts of ethos, credibility, and character development, I examine ethos appeals the Resource Manager used to align Corps's sustainability values with the community's values. Transcribed interviews with community members reveal this alignment evolved through a coconstructed ethos negotiation process between the Resource Manager and the community. The article concludes with rhetorical and pedagogical insights gained from the case study that apply to conflict resolution in organizational communication.