Raymond Rudolph Zimmerman (November 7, 1893 – 1976) was an American engineer, personnel manager, and civil servant. He is known as 6th president of the Society for Advancement of Management in the year 1944-1946, and as Administrative Assistant to President Truman in 1945-1947.
After graduation in 1917, when the United States joined entered World War I, Zimmerman joined the US Army and became first Lieutenant at the Infantry R.C. Texas, From 1919 to 1921 he served overseas as first Lieutenant as assistant superintendent and director of ports in Great Britain, and at the United States Shipping Board.
From 1922 to 1934 Zimmerman was employment and personnel manager at the Continental Oil Company, now Conoco, Ponca City, Oklahoma. In those days, in 1924, he took some courses at the Oklahoma Agricultural and Mechanical College at the Oklahoma State University–Stillwater. In 1925 he had become personnel director, and when Marland merged with the Continental Oil Company, he became personnel director for the entire firm. By 1932 he switched to the Industrial Relations Department of the Continental Oil Company, as where in 1933 he was industrial relations chief of the Continental Oil Co.
After Zimmerman left Continental Oil Company, by 1937, he was director of personnel of the Federal Home Loan Bank Board, which includes the Home Owners' Loan Corporation. By 1940 Zimmerman had joined the staff of the United States Civil Service Commission, where bin 1943 he served as executive assistant to the Chairman of the Council of Personnel Administration.
From September 1945 until early 1947 Zimmerman was Administrative Assistant to President Truman, as successor of George J. Schoeneman. He resigned March, 1947 on personal matters. He was succeeded five months later by Donald S. Dawson.
Some of the documentation of his federal work have ended up in the President Truman Library. Other later papers and his memoirs, until 1976, have ended up in the Niles Family Papers (1881-1991) at the Historical Library of Swarthmore College. Mary Cushing Niles had served in the United States Civil Service Commission from 1941-1957 as Assistant the Chairman of the Federal Personnel Council. Zimmerman had continued to cooperate with Niles, and others.
From 1944 to 1946 Zimmerman had served as national president of the Society for Advancement of Management (SAM) as successor of Percy S. Brown, and was succeeded by Harold B. Maynard. In 1978 the Greenville College awarded him the Greenville College Distinguished Alumnus award.
Zimmerman married Gladys Hall on February 29, 1926, and they had one daughter Mary Katherine Zimmerman.