Following his period in the army, Moreton joined the Diplomatic Service. His career included appointments as Ambassador from the United Kingdom to the Socialist Republic of Vietnam (1969–71) and British High Commissioner to Malta (1972–74).
Following his retirement, Moreton served as Gentleman Usher of the Blue Rod from 19 October 1979 – 24 July 1992.
Sir Anthony Abell
|Gentleman Usher of the Blue Rod
Sir John Margetson