In August 1971 Bourchier's appointment as Australian Ambassador to the Republic of Korea was announced.[3] He took up his appointment as head of mission in November 1971.[4]
From 1977 to 1980 Bourchier was Australian Ambassador to the Soviet Union.[1] Relationships between the two countries were tense during the period.[5] In 1979 Bourchier was medically evacuated from Moscow to London where he was diagnosed with a cerebral tumour. He stepped down from his post in August 1980.[1]
In June 1981, Bouchier was appointed an Officer in the general division of the Order of Australia in recognition of his services as a diplomatic representative.[6]
Bourchier died at home in Deakin, Canberra, on Friday 3 July 1981.[2]