Over his six decades of practice Peter Walker has designed hundreds of landscapes, taught at several universities, chaired the landscape architecture departments at Berkeley and Harvard, lectured widely, written, and served as advisor to numerous public agencies. The scope of his concerns ranges from the small garden to the planning of cities—with a particular emphasis on corporate headquarters, plazas, cultural gardens, academic campuses, and urban-regeneration projects. The awards his firms have received are too numerous to list, but they include IFLA's Sir Geoffrey Jellicoe Medal for lifetime achievement in landscape architecture. In addition to a very active practice, Walker also initiated the foundation of the CEO Roundtable, the journal LandForum, and the mounting of the landmark LandForum conference held in San Francisco in 1997.