Andrew W. Marshall (September 13, 1921 – March 26, 2019) was an American foreign policy strategist who served as director of the United States Department of Defense's Office of Net Assessment from 1973 to 2015. Appointed to the position by President Richard Nixon, Marshall remained in office during all successive administrations that followed until his retirement on January 2, 2015. He was succeeded in the role by James H. Baker.