Her first job was as a research associate at the Peabody Museum at Harvard, and later as a consulting anthropologist with the Chemical Corps.
His work in this field included support by Boeing, NASA, the Chemical Corps of the U.S. Army, the Army Corps of Engineers, and the Federal Civil Defense Administration.
Operation LAC (Large Area Coverage), was a Chemical Corps operation in 1957 and 1958 which dispersed microscopic zinc cadmium sulfide (ZnCdS) particles over much of the United States.
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Besides his work with the Japanese government, Duncan served as consultant to numerous industries and governmental agencies, including the US Army Chemical Corps, Glenn L. Martin Company, and Esso Standard Oil Company.