| Alistair Roger Macrow | Director | 1 Dec 2017 | 1 Jun 2018 | British | 56 years |
| Alistair Roger Macrow | Director | 12 Nov 2021 | 15 Sept 2025 | British | 56 years |
| Andrew Edward Taylor | Director | 9 Oct 1991 | 30 Nov 2004 | British | 69 years |
| Bernard Ingham | Director | 3 Jul 1991 | 30 Jun 2005 | British | 94 years |
| Brian John Mullens | Director | 1 Jul 2010 | 31 Oct 2012 | British | 55 years |
| Charles Hamilton Bell | Director | 28 May 2002 | 23 Nov 2004 | Australian | 66 years |
| Christine Marie Dekker | Secretary | 1 Dec 2017 | 12 Nov 2021 | - | - |
| Christine Marie Dekker | Director | 19 Sept 2019 | 7 Jan 2022 | American | 61 years |
| Christoph Norbert Hammer | Director | 1 Jul 2010 | 1 Jun 2011 | Austrian | 68 years |
| David Ogden Fairhurst | Director | 29 Oct 2010 | 3 Jan 2011 | British | 58 years |
| Della Burnside | Secretary | 8 Dec 2008 | 1 Dec 2017 | British | - |
| Denis Hennequin | Director | 7 Jul 2006 | 1 Dec 2010 | French | 68 years |
| Douglas Goare | Director | 1 Oct 2011 | 31 Dec 2018 | American | 74 years |
| Edward Anthony Oakley | Director | 3 Jul 1991 | 10 Apr 2001 | British | 85 years |
| Fred Leo Turner | Director | 3 Jul 1991 | 26 Jan 2004 | American | 93 years |
| Gareth Francis Helm | Director | 19 Sept 2019 | 3 Jul 2020 | British | 58 years |
| Gareth Pearson | Director | 29 Apr 2020 | 1 Apr 2024 | British | 56 years |
| George Alexander Mackay | Director | 8 Apr 1997 | 30 Dec 2004 | British | 73 years |
| Gerald Newman | Director | 3 Jul 1991 | 10 Oct 1992 | American | 95 years |
| Gillian Clare Mcdonald | Director | 1 Jul 2010 | 31 Mar 2015 | British | 62 years |
| Glen Patrick Steeves | Director | 2 Oct 2003 | 22 Jan 2007 | Canadian | 69 years |
| Henry William Trickey | Director | 1 Jun 2018 | 29 Jul 2022 | British | 58 years |
| James Alan Skinner | Director | 10 Apr 2001 | 1 Aug 2003 | American | 82 years |
| James Richard Cantalupo | Director | 3 Jul 1991 | 28 May 2002 | American | 83 years |
| Jason Clark | Director | 1 Oct 2016 | 30 Apr 2021 | British | 56 years |
| Jeffrey John Fergus | Director | 28 Jan 2004 | 30 Jun 2005 | British | 77 years |
| Jerome Tafani | Director | 20 Jul 2009 | 30 Dec 2013 | French | 68 years |
| John Arthur Glascock Slater | Secretary | 3 Jul 1991 | 3 Oct 2000 | British | - |
| John Park | Director | 1 Apr 2015 | 3 May 2023 | British | 50 years |
| Joseph Matthew Erlinger | Director | 1 Jan 2019 | 31 Jul 2019 | American | 53 years |
| Julian Crispin Hilton Johnson | Secretary | 3 Oct 2000 | 8 Dec 2008 | British | - |
| Kevin Alan Haag | Director | 3 Jul 1991 | 31 Aug 1993 | American | 77 years |
| Linda Buckley | Director | 22 Jan 2007 | 20 Jul 2009 | American | 68 years |
| Mahrukh Sultana Hussain | Director | 1 Jun 2011 | 15 Jul 2013 | American | 54 years |
| Malcolm Wayne Hicks | Director | 15 Jul 2013 | 28 Feb 2019 | British | 63 years |
| Marcus Patrick Hewson | Director | 3 Jul 1991 | 31 Dec 2004 | British | 77 years |
| Mark John Hawthorne | Director | 1 Jan 2014 | 5 Dec 2014 | Australian | 55 years |
| Michael Allen Flores | Director | 30 Dec 2013 | 1 Dec 2017 | American | 65 years |
| Michael Hayden | Director | 3 Jul 1991 | 31 Mar 1994 | British | 85 years |
| Michael James Roberts | Director | 1 Dec 2004 | 22 Aug 2006 | American | 76 years |
| Michael Robert Quinlan | Director | 3 Jul 1991 | 28 May 2002 | American | 82 years |
| Michelle Graham-clare | Director | 28 Sept 2021 | 2 Jan 2025 | British | 47 years |
| Paul James Pomroy | Director | 31 Oct 2012 | 12 Nov 2021 | British | 53 years |
| Paul Stephen Preston | Director | 3 Jul 1991 | 31 Dec 2000 | British | 79 years |
| Peter Bruce Beresford | Director | 30 Nov 2004 | 7 Jul 2006 | Canadian | 76 years |
| Peter Wyn Richards | Director | 9 Oct 1991 | 31 Dec 2004 | British | 69 years |
| Philip Cobden | Director | 3 Jul 1991 | 30 Aug 1996 | British | 90 years |
| Rebecca Dodd | Director | 21 Jan 2022 | 16 Oct 2023 | American,british | 35 years |
| Richard Paul Forte | Director | 3 Jan 2011 | 1 Oct 2016 | British | 57 years |
| Robert Adolph Toepfer | Director | 3 Jul 1991 | 30 Apr 2000 | American | 106 years |
| Russell Patrick Smyth | Director | 1 Aug 2003 | 1 Jul 2005 | American | 70 years |
| Stephen James Easterbrook | Director | 1 Jan 2005 | 29 Oct 2010 | British | 59 years |
| Stephen James Easterbrook | Director | 1 Dec 2010 | 1 Oct 2011 | British | 59 years |
| Terence Donovan Haynes | Director | 29 Sept 1993 | 1 Jan 1997 | Irish | 77 years |
| Terence Donovan Haynes | Director | 2 Oct 2003 | 31 Dec 2005 | Irish | 77 years |
| Thomas Banbury Allin | Director | 3 Jul 1991 | 29 Sept 1993 | Usa | 77 years |
| Zoe Hamburger | Director | 1 Apr 2024 | 1 Sept 2025 | American | 42 years |