| Adrian Richard Auer | Director | 14 Jan 2003 | 28 Feb 2005 | British | 77 years |
| Alan Sidney James Durant | Director | 21 Oct 1999 | 31 Oct 2002 | British | 89 years |
| Andrew Michael Smith | Director | 31 Aug 2009 | 30 Sept 2011 | British | 63 years |
| Anthony Periton Fage | Secretary | 8 Jun 1992 | 31 Mar 1993 | British | - |
| Bruno Bernhard Josef Baumgarten | Director | 8 Jun 1992 | 31 Dec 1995 | German | 97 years |
| Carl Lindsay Platt | Director | 23 Nov 2020 | 1 Sept 2022 | British | 53 years |
| Carlos Felix Fernandez Gonzalez-regueral | Director | 14 Nov 2006 | 1 Jul 2007 | Spanish | 65 years |
| Charles Bennett Brown | Secretary | 18 Nov 1998 | 26 May 2000 | British | - |
| Christopher Arthur Leese | Director | 23 Mar 2010 | 12 Dec 2018 | British | 65 years |
| Christopher Hampson | Director | 15 Feb 1995 | 3 May 2002 | British | 95 years |
| Daphne Margaret Murray | Secretary | 1 Nov 2016 | 30 Jun 2018 | - | - |
| David Alec Hart | Director | 23 Nov 2020 | 31 Jul 2025 | British | 53 years |
| David John Charles Munro | Director | 19 Jan 2004 | 28 Feb 2005 | British | 71 years |
| David Llewellyn | Secretary | 31 Mar 1993 | 24 Aug 1996 | British | - |
| David Neil Macfarlane | Director | 8 Jun 1992 | 31 Jan 2002 | British | 90 years |
| David Richard Swinson | Director | 1 May 1994 | 31 Jul 2000 | British | 84 years |
| Derek Michael John Odonnell | Director | 23 Mar 2010 | 30 Jul 2015 | Irish | 62 years |
| Derek William Jenkins | Director | 8 Jun 1992 | 30 May 1997 | British | 92 years |
| Emma Jayne Ashenden | Secretary | 20 Dec 2019 | 20 Jan 2023 | - | - |
| Fernando Gonzalez | Director | 1 Mar 2005 | 14 Nov 2006 | Mexican | 72 years |
| Francis Alastair Lavie Robinson | Director | 1 Jan 1996 | 28 Feb 2005 | British | 89 years |
| Frank James Standish | Secretary | 30 May 2000 | 29 Sept 2004 | British | - |
| Gerald Simon Tyler | Director | 8 Jun 1992 | 31 Dec 1993 | British | 95 years |
| Gerard Letourneau | Director | 21 Jul 1999 | 28 Feb 2005 | French | 78 years |
| Gonzalo Galindo Gout | Director | 14 Nov 2006 | 1 Jul 2007 | Mexican | 62 years |
| Gonzalo Galindo Gout | Director | 1 Mar 2008 | 5 Jul 2011 | Mexican | 62 years |
| Graham Edward Clark | Director | 1 Jan 2002 | 1 Jul 2004 | British | 71 years |
| Guillermo Francisco Martinez Sans | Director | 14 Nov 2006 | 1 Jul 2007 | Spanish | 64 years |
| Hector Medina | Director | 1 Mar 2005 | 14 Nov 2006 | Mexican | 76 years |
| Hector Tassinari Eldridge | Director | 1 Jul 2016 | 22 Jun 2018 | Spanish | 55 years |
| Helmut Claus Jurgen Mamsch | Director | 1 Jun 2002 | 28 Feb 2005 | German | 82 years |
| Ian Robinson | Director | 19 Jan 2000 | 21 Mar 2001 | British | 84 years |
| Ignacio Madridejos Fernandez | Director | 1 Mar 2008 | 1 Jan 2016 | Spanish | 61 years |
| Ignacio Ortiz Martin | Director | 1 Jul 2007 | 1 Mar 2008 | Mexican | 62 years |
| James Keith Stuart | Director | 1 Nov 1999 | 28 Feb 2005 | British | 86 years |
| James Robert Provan Pike | Director | 1 Jun 2002 | 28 Feb 2005 | British | 71 years |
| Jason Alexander Smalley | Director | 30 Sept 2011 | 22 Oct 2016 | British | 57 years |
| Jason Alexander Smalley | Secretary | 31 Mar 2015 | 1 Aug 2015 | - | - |
| Jesus Vicente Gonzalez Herrera | Director | 5 Jul 2011 | 30 Jun 2017 | American | 61 years |
| John Brian Cooper | Director | 8 Jun 1992 | 31 Dec 1995 | British | 94 years |
| John Camden | Director | 8 Jun 1992 | 30 Apr 1993 | British | 101 years |
| John Charles Spencer Mott | Director | 8 Jun 1992 | 26 May 1995 | British | 100 years |
| Jose Manuel Cascajero Rodriguez | Director | 1 Jul 2007 | 10 Mar 2008 | Spanish | 50 years |
| Jurgen Himstedt | Director | 1 Jan 1998 | 31 Dec 2001 | German | 85 years |
| Karlheinz Rosener | Director | 1 Jan 1997 | 3 May 2002 | German | 93 years |
| Larry Jose Zea Betancourt | Director | 31 Jul 2009 | 1 Oct 2019 | Venezuelan | 65 years |
| Laurence Burdett Dagley | Director | 22 Jun 2018 | 4 Nov 2024 | British | 50 years |
| Leslie Fletcher | Director | 8 Jun 1992 | 31 Dec 1996 | British | 104 years |
| Lorenzo Zambrano | Director | 1 Mar 2005 | 14 Nov 2006 | Mexican | 82 years |
| Marco Antonio Moreno Estrada | Director | 1 Mar 2005 | 31 Jul 2009 | Mexican | 71 years |
| Marco Antonio Moreno Estrada | Director | 14 Nov 2006 | 1 Jul 2007 | Mexican | 71 years |
| Michael Anthony Robertshaw | Director | 21 Feb 1996 | 31 Dec 1999 | British | 80 years |
| Michael David Hampson | Secretary | 1 Apr 1997 | 29 Sept 2004 | British | - |
| Michael George Foster | Director | 1 Feb 2000 | 1 Jul 2004 | British | 73 years |
| Michael Leslie Collins | Secretary | 1 Jul 2007 | 31 Mar 2015 | British | - |
| Michel Robert Daniel Andre | Director | 11 Jul 2017 | 12 Dec 2018 | French | 56 years |
| Miguel Alejandro Trinidad Gonzalez | Director | 10 Mar 2008 | 31 Aug 2009 | Mexican | 49 years |
| Narinder Nath Kalia | Secretary | 3 Jun 1996 | 31 Dec 1999 | British | - |
| Peter Hamilton Fulke Bullard | Secretary | 8 Jun 1992 | 3 Jun 1996 | British | - |
| Peter Lance Young | Director | 8 Jun 1992 | 30 Jun 2000 | British | 88 years |
| Philip Roy Hampton | Director | 1 Jun 2002 | 28 Feb 2005 | British | 73 years |
| Precel James Owen | Director | 8 Jun 1992 | 31 Dec 1995 | British | 96 years |
| Ramiro Villarreal | Director | 1 Mar 2005 | 14 Nov 2006 | Mexican | 79 years |
| Rebecca Juliet Wright | Secretary | 30 Jun 2018 | 20 Dec 2019 | - | - |
| Robert Ernest Lambourne | Director | 1 Apr 1997 | 9 Jan 2003 | British | 74 years |
| Stuart Richmond Walker | Director | 1 Sept 1993 | 29 Jan 2004 | British | 82 years |
| Susan Margaret Henderson | Secretary | 29 Sept 2004 | 28 Feb 2005 | British | - |
| Thomas John Parker | Director | 1 Oct 2001 | 28 Feb 2005 | British | 84 years |
| Victor Romo | Director | 1 Mar 2005 | 14 Nov 2006 | Mexican | 68 years |
| Vishal Puri | Secretary | 1 Aug 2015 | 1 Nov 2016 | - | - |
| William John Alexander | Director | 21 Mar 2001 | 28 Feb 2005 | British | 79 years |