Public attitudes toward invasive alien species management and trust in managers’ ability to effectively manage non-native species can determine public support for conservation action. Guam has experienced widespread species loss and ecosystem transformation due to invasive species. Despite Guam’s long history with invasives and efforts to eradicate them, we know little about the sociological context of invasive species. Using focused group discussions, we explore public attitudes toward invasive species management. Respondents expressed support for management activities and a desire to participate directly in conservation actions. Participants also expressed frustration with government institutions and lack of confidence in managers’ abilities to control invasive species. Perceptions of managers’ trustworthiness, communication with managers, and positive personal experiences with managers were related to positive attitudes about management and support for existing initiatives.