| CARGILL, David Ian ACTIVE | Secretary | 20 Apr 2015 | | | | Peregrine House, Peregrine Road, Westhill, Aberdeenshire, AB32 6JL, United Kingdom |
| BOYAULT, Gwenola Jacqueline Stephanie ACTIVE | Director | 04 Jan 2017 | | United Kingdom | March 1972 | Schlumberger House, Buckingham Gate, Gatwick Airport, Gatwick, West Sussex, RH6 0NZ, United Kingdom |
| JACK, Ian ACTIVE | Director | 20 Apr 2015 | | Scotland | September 1963 | Schlumberger House, Buckingham Gate, Gatwick Airport, Gatwick, West Sussex, RH6 0NZ |
| O'BRIEN, Thomas Francis RESIGNED | Secretary | | 06 Jun 1994 | | | 31 Worcester Road, Grantham, Lincolnshire, NG31 8SF |
| PIA, Paul Dominic RESIGNED | Secretary | 06 Jun 1994 | 20 Apr 2015 | | | 50 Lothian Road, Festival Square, Edinburgh, EH3 9WJ |
| BELPASSI, Augusto Giovanni RESIGNED | Director | | 10 Aug 1994 | | June 1937 | 9 Grange Park Place, Wimbledon, London, SW20 0EE |
| BISHOP, William David RESIGNED | Director | | 10 Nov 1992 | | October 1927 | 3711 San Felipe, Houston, Texas 77027, FOREIGN, Usa |
| CASIRAGHI, Marta RESIGNED | Director | | 10 Aug 1994 | | February 1948 | Flat 21 Moscow Mansions, 224 Cromwell Road, London, SW5 0SP |
| CHANDLER, Richard Edwin RESIGNED | Director | | 31 Dec 2002 | | July 1956 | 24611 Mount Auburn, Katy Texas, Usa |
| EMERICK, James Robert RESIGNED | Director | 10 Nov 1992 | 19 May 1994 | | April 1936 | 1118 Tigris, Houston, Texas 77090, FOREIGN, Usa |
| GAMBLE, Ernest Richard Herman RESIGNED | Director | | 31 Oct 2001 | | March 1936 | Milestones Wells Road, Westbury Sub Mendip, Wells, Somerset, BA5 1EX |
| HOEING-COSENTINO, Karin Annette RESIGNED | Director | 29 Jun 2015 | 04 Jan 2017 | Scotland | February 1971 | Schlumberger House, Buckingham Gate, Gatwick Airport, Gatwick, West Sussex, RH6 0NZ |
| KENNEDY, Bobby Ray RESIGNED | Director | | 28 Jun 1994 | | June 1932 | 20103 Hardnidge Court, Katy, Texas 77450, Usa |
| KIDD, Ryan Alexander RESIGNED | Director | 29 Jun 2015 | 04 Jan 2017 | Scotland | January 1980 | Schlumberger House, Buckingham Gate, Gatwick Airport, Gatwick, West Sussex, RH6 0NZ |
| LAKEY, William Albert RESIGNED | Director | | 28 Jun 1994 | | December 1934 | 14215 Indian Wells Road, Houston, Texas, Usa |
| MCDONALD, Simon Hugh Duncan RESIGNED | Director | 18 Oct 1995 | 25 Jul 1996 | | April 1946 | 3 Westhill Grange, Westhill,Skene, Aberdeen, Grampian, AB21 6QJ |
| MCKENZIE, Donald RESIGNED | Director | | 23 Jun 2003 | | March 1949 | 3410 Sagecircle West, Houston, Texas, 77056, United States |
| MONTGOMERY, Brian Sinclair RESIGNED | Director | 17 Jan 2003 | 18 May 2004 | | June 1972 | 12 Sunnyside Gardens, Aberdeen, AB24 3LZ |
| RIVERS, Christopher Iain Samuel RESIGNED | Director | 19 May 1994 | 31 Dec 2002 | | December 1954 | 18615 Burnt Candle, Spring 77388, Texas, U.S.A. |
| BURNESS (DIRECTORS) LIMITED RESIGNED | Nominee Director | 18 May 2004 | 20 Apr 2015 | | | 50 Lothian Road, Festival Square, Edinburgh, EH3 9WJ |