In 1957, Eng became ambassador in Cairo and non-resident ambassador in Riyadh.[1] Also in 1957, the Canadian ambassador in Cairo, E. Herbert Norman committed suicide by jumping of Eng's apartment building.[2] Two years later, Eng was ambassador in Cairo and envoy in Riyadh. He was ambassador in The Hauge from 1961 to 1965 and in Rome from 1966 to 1973, as well as non-resident ambassador in Valletta from 1969 to 1973. Eng's last position before retirement was as ambassador in Moscow and non-resident ambassador in Ulaanbaatar from 1973 to 1975.[3]