William F. Hausman, 64, director of enforcement and operations at the Treasury Department for the past nine years, died at Bethesda Naval Hospital Monday as the result of a lung ailment.

Prior to beginning his civilian career with the government in 1963, he had served for 28 years with the Marine Corps and retired with the rank of colonel.

Col. Hausman was concerned with supervision of Treasury's Secret Service, alcohol, tax and firearms, and customs functions. He joined the department in 1968 as an adviser on the security of international financial transactions.

He was born in Indianapolis and graduated from DePauw University. He joined the Marine Corps in 1935, became a pilot, and had more than 4,000 hours at the controls of military aircraft. Following his retirement in 1963, he worked for the National Aeronautics and Space Administration and the Commerce Department.

In 1975, Col. Hausman, who lived in Alexandria, received the Treasury's Exceptional Service Award. He also was awarded the Cruz Boyaca by the government of Colombia.

Survivors include his wife, Mary Jane, of Arlington; a daughter, Karen P. Garver, also of Arlington; two sons, W.F. Jr., an Army major stationed at Nuremburg, Germany, and Joseph L., of Los Angeles; a brother, Robert, of Humble, Tex., and six grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to a charity of one's choice.