He worked for the British Foreign Office, posted to the British embassy Belgrade 1954–1956 and subsequently at the Central Office of Information (COI) 1956-1987. In retirement he frequently worked at the British Public Record Office, now known as The National Archives, where he discovered unpublished material on the early American colonists. His resulting articles published in the National Genealogical Society Quarterly (NGSQ) led to his recognition and several awards of excellence. He pioneered the then neglected field of English convict transports to America and indentured servants.