| Bernadette Clare Young | Secretary | 14 Dec 2000 | 6 Dec 2001 | British | - |
| Denise Patricia Cockrem | Director | 5 Dec 2008 | 10 Oct 2012 | British | 64 years |
| Eric Roland Wills | Secretary | 7 May 1992 | 23 Apr 1997 | British | - |
| Geoffrey Ernest Browne | Director | 7 May 1992 | 30 Jun 1992 | British | 96 years |
| George Stephan Pater | Director | 1 Feb 2000 | 31 Oct 2002 | British | 75 years |
| Heather Gwendolyn Brierley | Secretary | 15 Sept 2000 | 14 Dec 2000 | British | - |
| Ian Adam Craston | Director | 5 Dec 2008 | 3 Sept 2013 | British | 60 years |
| Ian Macdonald Trotter | Director | 1 Jul 1992 | 30 Sept 1996 | British | 88 years |
| Jacqueline Elizabeth Fox | Secretary | 27 Nov 2002 | 9 Dec 2005 | British | - |
| James Gregory Jewell | Director | 7 May 1992 | 30 Jun 1993 | British | 84 years |
| Jamie Jeremy Woods | Director | 7 May 1992 | 19 Dec 1997 | British | 85 years |
| Jan Victor Miller | Director | 29 Jun 2001 | 28 Sept 2004 | British | 75 years |
| Jan Victor Miller | Secretary | 10 Jun 2002 | 27 Nov 2002 | British | - |
| John Hilton Berg | Secretary | 24 Apr 1997 | 15 Sept 2000 | British | - |
| John Michael Mills | Director | 3 Sept 2013 | 14 Nov 2014 | British | 62 years |
| John Stanley Kent | Director | 5 Sept 1994 | 31 Dec 1999 | British | 83 years |
| John Symes | Director | 7 May 1992 | 31 Aug 1997 | British | 86 years |
| Michael Harris | Director | 5 Dec 2008 | 31 May 2013 | British | 61 years |
| Non-destructive Testers Limited | Corporate Director | 27 Nov 2002 | 16 Dec 2008 | United Kingdom | - |
| Paul Lewis Miles | Director | 5 Dec 2008 | 30 Jun 2010 | British | 55 years |
| Peter Graham Taylor | Director | 7 May 1992 | 31 Aug 1994 | British | 87 years |
| Robert John Clayton | Director | 5 Dec 2008 | 3 Sept 2013 | British | 56 years |
| Ronald Horace William Winch | Director | 2 Aug 1993 | 31 Dec 1997 | Australian | 91 years |
| Roysun Limited | Corporate Director | 27 Jul 2004 | 16 Dec 2008 | United Kingdom | - |
| Thomas Arthur Hayes | Director | 5 Sept 1994 | 29 Jun 2001 | British | 83 years |
| Vanessa Jones | Secretary | 6 Dec 2001 | 26 Apr 2002 | British | - |
| William Rufus Benjamin Mcdonnell | Director | 16 Jun 2011 | 3 Sept 2013 | British | 53 years |