Spalding DeDecker (SD) is an employee-owned consulting engineering firm established in 1954, with offices in Detroit, Grand Rapids, Novi, and Rochester Hills, Michigan. The company specializes in infrastructure, land development, and surveying, offering a diverse range of engineering, surveying, and construction engineering services for municipal, land development, transportation, and water/wastewater projects. With over 90 talented employees, SD provides full-service civil design engineering and surveying solutions.
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