CDM Smith

CDM Smith Inc. is an American engineering and construction company headquartered in Boston, Massachusetts. CDM Smith offers services in water, environment, transportation, energy and facilities projects for public and private clients. Major services include design, consulting and program management with a focus on emerging areas such as polyfluoroalkyl substances (PFAS), complete corridors, lead in drinking water, digital solutions, and water reuse and desalination. The employee-owned company is currently ranked 22nd on Engineering News-Record's 2025 Top 500 Design Firms list and 25th on their 2025 Top 200 Environmental Firms list. Camp Dresser & McKee (CDM) was founded in 1947 by Thomas Ringgold Camp with partners Herman Dresser and Jack McKee. Due to Camp’s background in sanitary engineering, the company initially focused on drinking water infrastructure programs in New England. In the 1960s when the firm started accepting contracts internationally in Colombia and Bangladesh, the firm grew to become a global engineering and construction firm. Through numerous acquisitions in the 1970s, as well as partnering with the U.S. EPA in 1973 and other federal agencies in 1985, CDM Smith expanded to offer services in clean water, hazardous waste and the environment, transportation, energy, and facilities sectors on a national and international scale. Today, the company has nearly 5,000 employees in 131 offices, with 85 offices being in the United States. In 2011, CDM acquired Wilbur Smith, a 1,000-employee transportation engineering firm, to form CDM Smith.