| Alan Harcourt Craig | Director | 8 Jan 1993 | 30 Jun 2005 | British | 77 years |
| Alexander Macdonald | Director | 8 Jan 1993 | 30 Jun 2005 | British | 77 years |
| Cameron Stuart Lindsay | Director | 1 Jan 1995 | 31 Dec 2002 | British | 81 years |
| David Ellis | Director | 5 Sept 2018 | 3 Jun 2019 | British | 54 years |
| David Fred Fawcett | Director | 8 Jan 1993 | 30 Jun 2005 | British | 79 years |
| David James Banks | Director | 8 Jan 1993 | 1 Jan 1998 | British | 89 years |
| David John Noakes | Director | 1 Apr 1993 | 31 Dec 2004 | British | 80 years |
| Gary Smith | Director | 1 Jan 1994 | 31 Dec 2004 | British | 82 years |
| Geoffrey Booth | Director | 8 Jan 1993 | 31 Dec 1993 | British | 93 years |
| Gordon Grier Thomson Masterton | Director | 8 Jan 1993 | 30 Jun 2005 | British | 72 years |
| Graham Kinder | Director | 8 Jan 1993 | 31 Dec 1995 | British | 95 years |
| Henry George Perfect | Director | 8 Jan 1993 | 31 Dec 2002 | British | 82 years |
| Jacobs U.k. Limited | Corporate Secretary | 8 Jan 1993 | 13 Dec 2005 | United Kingdom | - |
| James Peter Millmore | Director | 8 Jan 1993 | 31 Dec 2002 | British | 80 years |
| Leon Anthony Power | Director | 12 Nov 2007 | 5 Dec 2016 | Irish | 68 years |
| Mark Cubitt | Director | 31 Dec 2002 | 31 Jan 2007 | British | 63 years |
| Michael Sean Udovic | Secretary | 13 Apr 2011 | 1 Sept 2015 | - | - |
| Michael Timothy Norris | Secretary | 13 Dec 2005 | 23 May 2018 | British | - |
| Morris James Murray | Director | 8 Jan 1993 | 30 Jun 2005 | British | 81 years |
| Norman Stevenson Mclean Berry | Director | 8 Jan 1993 | 31 Dec 1993 | British | 93 years |
| Patrick William Wingfield | Director | 1 Apr 1993 | 31 Dec 2004 | British | 79 years |
| Robert Hugh Clarke | Director | 1 Apr 1993 | 30 Jun 2005 | British | 80 years |
| Robert Shepherd Duff | Director | 1 Jan 1995 | 30 Jun 2005 | British | 67 years |
| Ronald Macdonald Angus | Director | 8 Jan 1993 | 1 Jan 1995 | British | 92 years |
| Thomas Alan Johnston | Director | 8 Jan 1993 | 31 Dec 1995 | British | 91 years |
| William Clyde Markley | Secretary | 13 Dec 2005 | 13 Apr 2011 | American | - |
| William Gilchrist Mitchell | Director | 8 Jan 1993 | 22 Dec 2006 | British | 82 years |
| William John Cameron Broadfoot | Director | 31 Jan 2007 | 25 Oct 2007 | British | 72 years |
| William John Paterson | Director | 8 Jan 1993 | 31 Dec 1998 | British | 85 years |