O2 Planning + Design Inc.(O2) is a multidisciplinary firm of landscape architects, urban and regional planners, urban designers, landscape ecologists, reclamation ecologists, and water resource engineers. Founded in 1991, O2 specializes in the planning and design of rapidly changing and highly valued places. O2 combines creative design with extensive environmental planning and scientific understanding to produce sustainable and inspired solutions that promote ecological, cultural, and economic development. 

O2's head office is located in Calgary, with offices in Victoria and Edmonton.