MacKay Sposito is a multidisciplinary consulting firm founded in 1974, headquartered in Vancouver, Washington, with over 50 years of experience serving the Pacific Northwest and beyond, including Washington, Oregon, Alaska, Idaho, Montana, Wyoming, Utah, and California. The firm specializes in energy, public works, and land development markets, offering a comprehensive suite of professional services including civil engineering, land surveying, construction management and inspection, landscape architecture, environmental science and permitting, and planning.