He joined the Diplomatic Service as a Third Secretary in 1920,[3] after being admitted under open competition in September 1919.
[9] He served as Deputy Under-Secretary of State for Foreign Affairs from 1946 to 1948 and as Ambassador to France from 1948 to 1954.
He was appointed a Knight Commander of the Order of St Michael and St George in the 1946 Birthday Honours[10] (and promoted to Knight Grand Cross of that Order in the 1948 New Year Honours[11]) and Knight Grand Cross of the Royal Victorian Order in the 1950 Birthday Honours.
Lord Harvey of Tasburgh married Maud Annora, daughter of Arthur Watkin Williams-Wynn, in 1920.
He died in November 1968, aged 75, and was succeeded in his titles by his son Peter.