In 1938, Rumpff decided to practice as an advocate and joined the Pretoria
Bar and also taught part-time in private law at the University of Pretoria. He was appointed
King's Counsel in 1951. He was appointed to the
Transvaal Provincial Division of the
Supreme Court of South Africa in 1951, and served on the court until 1961. He was the Judge President of the court from 1959 to 1961. In 1961, he was one of the judges who acquitted all the defendants in the
Treason Trial. In 1961, he was appointed to the
Appellate Division of the
Supreme Court of South Africa. He became Chief Justice of South Africa in 1974 in succession to
Newton Ogilvie Thompson, and served in that position until his retirement in 1982. ==See also==