Led by landscape architects Daniel Urban Kiley, Ian Tyndall, and Peter Ker Walker, the firm known as Kiley, Tyndall, Walker practiced from 1974 to 1979 near Charlotte, Vermont. Though the three designers had been working together since the mid-1960s at the Office of Dan Kiley, the name change symbolized their stronger collaboration and shared responsibilities. While they continued to accept landscape architecture projects on commercial and residential properties, they also expanded the firm’s pursuit of campus planning, urban development, and master planning projects. Notable designs from this period, including the National Gallery of Art in Washington, DC and L'Esplanade du Général de Gaulle at La Défense in Paris, demonstrate a skillful handling of civic space on a monumental scale inspired by social and national histories. In addition to domestic projects primarily on the East Coast and in the Midwest, Kiley Tyndall Walker accepted commissions in England, France, Spain, and Iran. With the departure of Tyndall in 1979, the firm became known as Kiley Walker.