How do students learn to lead? In the President’s Sustainability Research Fellowship (PSRF) at Swarthmore College, they learn by leading: by taking stewardship over vital sustainability challenges. The program matches small teams of advanced students with staff and faculty mentors to research, develop, and implement projects in a year-long course and associated internship. In the program’s pilot year, our Fellows are doing all we could have asked: redesigning our waste management system, developing a 3-year vision for campus woods stewardship, implementing Swarthmore's internal carbon price, launching behavioral change strategies to reduce greenhouse gas emissions, and creating a system to track sustainability progress across campus. They’re also doing more than we could have imagined. In tackling waste reduction, for instance, Fellows are uniting custodial staff and students by redefining waste as an environmental justice issue. In championing the campus woods, Fellows are connecting faculty and students with grounds and arboretum staff to engage not only the College provost and vice-presidents but also neighboring communities. The pioneering PSRF program, a collaboration between the President’s Office, the Office of Sustainability, the Environmental Studies Program, and the Lang Center for Civic and Social Responsibility, fosters interdisciplinary collaboration throughout the institution. As students learn, lead, and innovate, they apply their knowledge to pressing needs and produce replicable solutions for our campus and beyond.