After returning to Cameroon, Oyono served as an ambassador to various countries from 1965 to 1974; from 1974 to 1982 he represented Cameroon at the United Nations, and from 1982 to 1985 he again served as ambassador to various countries.
He again served as ambassador to various countries. He was returning to Cameroon, Oyono; from 1974 to 1982, and from 1982 to 1985. This Cameroon, Oyono was served as an ambassador to various countries from 1965 to 1974. He represented Cameroon 1974 to 1982 at the United Nations.