|Born||13 January 1914|
|Died||30 September 1981 (aged 67)|
|Alma mater||Balliol College, Oxford|
|Spouse(s)||Jennifer Margaret Wainwright|
|Service branch||Secret Intelligence Service (SIS/MI6)|
|Rank||Chief of the Secret Intelligence Service|
Educated at Wellington College and Balliol College, Oxford, Rennie joined an advertising agency in New York City in 1935. During World War II he worked at an organisation in Baltimore combating German propaganda.
In 1946 he joined the Foreign Office and was posted to Washington D.C. and then to Warsaw. In 1953 he was appointed Head of the Information Research Department, a controversial body established to disseminate information about the dangers of Soviet-style communism. During the Suez Crisis he chaired a committee established to disseminate British propaganda in the Middle East. He was posted to Buenos Aires in 1958 and Washington D.C. in 1960. He served on the Civil Service Commission in 1966. Then in 1968 he was appointed Chief of the Secret Intelligence Service.
On 15 January 1973, Rennie's son Charles Tatham Ogilvy Rennie, and his daughter-in-law were arrested for an alleged involvement in the importation of large quantities of heroin from Hong Kong. Rennie resigned not long afterwards.
Sir Dick White
| Chief of the SIS
Sir Maurice Oldfield