Rupert O. Sharitz, 75, a teacher and administrator with the D.C. public school system for many years, died Wednesday at Sibley Memorial Hospital after a long illness!

At his retirement in 1960, he was chairman of the business department at Eastern High School and manager of the school store, a position he had held since 1947.

Born in Wytheville, Va., Mr. Shartiz was a graduate of Emory and Henry College and held a master's degree from George Washington University.

He joined the public school system here in 1924, serving in the department of business education at the old Business High School.

In 1942, while he was assistant principal of the night school of Roosevelt High School, Mr. Sharitz was commissioned in the Army Air Forces. He saw duty as an intelligence officer in Montgomery, Ala., and Chicago, and as a counselor at the separation centers at the Pentagon and Ft. Dix, N.J.

In 1946, after leaving military service, he was counselor to veterans attending Central High School in Washington.

After his retirement, Mr. Sharitz was active in real estate and in the development of Wood Acres, Md., where he had lived since 1940.

He was a member of the D.C. Federal Schoolmen's Club.

He is survived by his wife, Louise S., of the home, and a sister, Frieda Butt, of Pocahontas, Va.

The family suggests that expressions of sympathy may be in the form of contributions to the American Cancer Society or the Leukemia Society of America.