Educated at the University of California, Berkeley, and at the Harvard University Graduate School of Design, Walker has designed hundreds of projects, taught, lectured, written, and served as an advisor to numerous public agencies. The scope of his concerns is expansive—from the design of small gardens to the planning of cities—with a particular emphasis on corporate headquarters, plazas, cultural gardens, academic campuses, and urban-regeneration projects.Co-founder of the firm Sasaki, Walker and Associates (established in 1957), Walker opened its West Coast office, which became The SWA Group in 1976. As principal, consulting principal, and chairman of the board, he helped to shape The SWA Group as a multidisciplinary office with an international reputation for excellence in environmental design. In 1983, he formed Peter Walker and Partners, now known as PWP Landscape Architecture.