In 1945, he served as an adviser to the Secretary of Agriculture.

The staff of the Office serves as the immediate staff to the Secretary.

He also served as Counselor to the Secretary of the Treasury (1981-85).

He served as assistant to the Secretary of the Interior 1915-1917.

In that position, he served as the principal policy adviser to the Secretary of Health and Human Services.

In addition she served as military assistant to the acting Secretary of the Air Force.

He served at that time as the Scientific Advisor to the Secretary of the Army.

He served as assistant to the Secretary of Labor in 1918 and 1919.

After his rehabilitation he served as an expert advisor to the Secretary of Defense.

Jones serves as Special Assistant to the Secretary of Defense.