James Scott Kemper Sr. (November 18, 1886 - September 17, 1981) was a U.S. businessman, philanthropist, and diplomat who served as U.S.

In the early years of his career, Kemper worked as a special agent for the Central Manufacturing District and as an executive for a variety of lumber mutual companies.

[8] Kemper was appointed by President of the United States Dwight Eisenhower to the position of Ambassador to Brazil in 1953 and confirmed by voice vote by the Senate.

During his tenure, Kemper presided over a variety of mining and shale oil agreements between the United States and Brazil.

Kemper was a personal friend and confidante of U.S. Presidents William Howard Taft, Herbert Hoover and Eisenhower.