A renowned structural engineer, Cecil Balmond has over the past three decades played an instrumental role in the work of architects such as Philip Johnson, Rem Koolhaas, and Daniel Libeskind. His unconventional approaches to engineering problems and structural geometry have aided those figures in realizing some of their most daring ideas and, in the process, radically expanded the realm of possibilities in architecture. Though also—and increasingly—an architect in his own right with notable projects to his credit, Balmond will likely remain best known as the engineer whose structural ingenuity