Carollo engineers
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Carollo Engineers is an environmental engineering firm specializing in the planning, design, and construction of water and wastewater facilities. The firm is headquartered in Pheonix, Arizona and currently maintains 25 offices in 11 states. 2005 revenues totaled $121.6 million; of that revenue 46% originated from the water market and 54% was wastewater related.[1]
Carollo Engineers was founded in 1933 as a new partnership called Headman, Ferguson, and Carollo. In 1957 the firm became John A. Carollo, Consulting Engineers. The corporation's name was later changed to Carollo engineers.