Sustainability-related learning objectives in university curricula are becoming increasingly popular. While knowledge gain is usually a prevalent metric of success, this study assessed whether a project-based learning assignment could lead to attitudinal shifts in students regarding sustainability. After performing both primary (distributing/analyzing surveys, in-depth interviews) and secondary research, students constructed strategic communication campaign plans the campus sustainability client could implement. Students' (n = 28) attitudes toward sustainability (e.g., severity, susceptibility, self-efficacy, response-efficacy) were measured the first and last day of class. Analyses revealed significant positive shifts in all attitudes measured after project completion. Recommendations in implementing project-based learning activities are discussed.