Martin J. Collins (1951–2025) was a pioneering historian of Cold War science, global communications, and the cultural politics of space exploration. As a longtime curator at the Smithsonian National Air and Space Museum and editor of History and Technology, Collins championed scholarship that crossed disciplinary and geographic boundaries. His work brought critical attention to infrastructure, systems thinking, and the transnational flows of information, capital, and power that defined the late twentieth century. This roundtable brings together colleagues and collaborators to reflect on the wide-ranging impact of Collins' research – from work on extensive oral history projects, to curatorial practice, to studies of globalization, satellites, and surveillance – and to explore how his legacy continues to shape contemporary approaches to history, science and technology in both scholarly and public contexts.