| Bradley Lee Mallory | Director | 21 Feb 2008 | 30 Sept 2009 | United States | 74 years |
| Charles Inskeep Homan | Director | 1 Jun 1995 | 24 May 2000 | American | 83 years |
| David Stuart Hall | Director | 30 Jun 1991 | 7 Jul 2000 | British | 79 years |
| David Stuart Hall | Secretary | 30 Jun 1991 | 7 Jul 2000 | British | - |
| Derek Stuart Blackwood | Director | 6 Apr 2011 | 31 Dec 2013 | British | 72 years |
| Donald James Nelson | Director | 3 Mar 1993 | 31 May 1995 | American | 82 years |
| Donald Paul Fusilli (jnr) | Director | 3 Mar 1993 | 26 Jan 2007 | American | 75 years |
| Gary Dale Pugh | Director | 31 Dec 2009 | 22 May 2012 | American | 65 years |
| Glenn Stephen Burns | Director | 1 Jun 1995 | 1 Jun 1996 | American | 77 years |
| Graham Rodney Levett-prinsep | Director | 24 May 2000 | 26 Apr 2002 | American | 78 years |
| Graham Rodney Levett-prinsep | Director | 30 Sept 2009 | 22 May 2012 | American | 78 years |
| Grant Rae Angus | Director | 23 Feb 2016 | 12 Aug 2022 | British | 56 years |
| Henry James Mcknight | Director | 19 Oct 1995 | 30 Sept 2009 | American | 82 years |
| Iain Angus Jones | Secretary | 18 Dec 2015 | 12 Jun 2024 | - | - |
| Ian Johnson | Secretary | 30 Sept 2009 | 1 Sept 2010 | British | - |
| James Duncan Crawford | Director | 22 May 2012 | 12 Aug 2016 | British | 55 years |
| John Patrick Prendersast | Director | 30 Jun 1991 | 10 May 2000 | Irish | 81 years |
| John Robert White | Director | 1 Jun 1995 | 24 May 2000 | American | 84 years |
| Lachlan John Wynne | Director | 30 Apr 2013 | 23 Feb 2016 | British | 51 years |
| Michael Dewayne Whitten | Director | 24 May 2000 | 24 Apr 2002 | American | 67 years |
| Michael Emil Gibbs | Director | 3 Mar 1993 | 31 May 1995 | American | 84 years |
| Nicholas Gray | Director | 22 May 2012 | 30 Apr 2013 | Scottish | 56 years |
| Reed Smith Corporate Services Limited | Corporate Secretary | 9 Feb 2001 | 30 Sept 2009 | United Kingdom | - |
| Richard Leslie Shaw | Director | 24 Jan 2007 | 21 Feb 2008 | American | 99 years |
| Robert Alfred Rudin | Director | 30 Jun 1991 | 10 May 2000 | Usa | 84 years |
| Robert Muirhead Birnie Brown | Secretary | 1 Sept 2010 | 18 Dec 2015 | - | - |
| William Gough Thomas | Director | 3 Mar 1993 | 31 May 1995 | American | 91 years |
| William Peter Mooney | Director | 24 May 2000 | 7 Sept 2007 | American | 75 years |
