He was educated at the Glasgow Academy and the University of Edinburgh, where he took first class honours in the Legum Baccalaureus examination.
[1] In 1901, Renton was sent to Mauritius as Procureur and Advocate-General, and served as a judge on the island.
[1] In 1919, the Foreign Office sent him to Egypt, where he was vice-president of the Egyptian Riots Indemnities Commission.
He was appointed a Knight Commander of the Order of St Michael and St George in the 1925 Birthday Honours and promoted a Knight Grand Cross of the same order in 1930.
In his obituary, The Times described him as a popular man: "Personally, he was much liked, and his Scottish humour was enhanced by the agreeable accent with which it was conveyed.