
Secretary-General of the OEEC
№ Secretary-General Time served Country of origin
- Robert Marjolin 1948 – 1955 France
- René Sergent 1955 – 1960 France
- Thorkil Kristensen 1960 - September 1961 Denmark
Secretary-General of the OECD
№ Secretary-General Time served Country of origin
- Thorkil Kristensen 30 September 1961 - 30 September 1969 Denmark
- Emiel van Lennep 1 October 1969 - September 1984 Netherlands
- Jean-Claude Paye 1 October 1984 - 30 September 1994 November 1994 - 30 May 1996 France
- Donald Johnston 1 June 1996 - 30 May 2006 Canada
- José Ángel Gurría 1 June 2006 – 31 May 2021 Mexico
- Mathias Cormann 1 June 2021 – Present Belgium
Staffan Sohlman (interim) 1 October 1994 - November 1994 Sweden