In 1948, Kevin was acting High Commissioner of Australia to India.[3] Kevin and his wife Hermine separated in 1949.[4] In 1951 Kevin's wife Hermine petitioned for divorce and was granted an order for restitution of conjugal rights; when Charles Kevin petitioned for divorce in January 1952 the request was rejected.[5][6]
Kevin was posted Minister to Indonesia in 1953, an appointment that then Minister for external affairs Richard Casey, Baron Casey said was part of a planned policy to build up diplomatic relations in Asia's south east.[7] While he was Minister, Australia and Indonesia signed a new trade agreement for the trade of goods worth over £5 million.[8]
After his Indonesia posting, from 1955 to 1959, Kevin was an assistant secretary in the external affairs department in Canberra.[9] He arrived for his next posting as High Commissioner to Ceylon in 1959, serving in that capacity until 1961. In Ceylon, Kevin met Mary Therese Wilson, an Englishwoman and began a new relationship, whilst still married to Hermine.[2]
Kevin was appointed High Commissioner to Pakistan, in 1961 he arrived in the country in September that year.[10]
His divorce was finally granted in 1962, while he was Ambassador-designate to South Africa.[4] On 6 May 1963, Kevin married Mary Therese Wilson.[2]
His appointment as Ambassador to Sweden was announced in September 1967, with the intention for the posting to take effect on the retirement of Bertram Ballard.[11] Before he could leave for Sweden, on 13 February 1968, Kevin died of cancer while still in office in Pretoria.[2] Kevin's body was buried at the Zanderfontein Cemetery near Pretoria in South Africa.[12]