| Amec Nominees Limited | Corporate Director | 8 Dec 2003 | 8 Dec 2003 | United Kingdom | - |
| Andrew Stuart Mclean | Director | 18 Dec 2019 | 22 Aug 2024 | British | 56 years |
| Andrew William Winterbotham | Director | 6 Dec 2016 | 18 Dec 2019 | British | 69 years |
| Anthony Roger Jinks | Director | 8 Dec 2003 | 11 Jan 2011 | British Canadian | 75 years |
| Benjamin Charles Sawford | Director | 1 Aug 2006 | 8 Jan 2009 | British | 54 years |
| Charles Mouzannar | Director | 22 Jul 2013 | 11 Nov 2016 | Us Citizen | 62 years |
| Christopher Laskey Fidler | Secretary | 16 Jun 2009 | 22 Jul 2016 | British | - |
| Colin Fellowes | Secretary | 8 Dec 2003 | 16 Jun 2009 | British | - |
| Grant Rae Angus | Director | 18 Dec 2019 | 20 Sept 2022 | British | 56 years |
| Hisham Helmi Hussein Mahmoud | Director | 11 Jan 2011 | 13 Jul 2011 | American | 60 years |
| Iain Angus Jones | Secretary | 16 Feb 2018 | 12 Jun 2024 | - | - |
| James Arthur Beechinor | Director | 8 Dec 2003 | 19 Dec 2007 | Canadian | 74 years |
| Janice Gayle Baker | Director | 1 Aug 2006 | 13 Jul 2011 | American | 79 years |
| Jennifer Ann Warburton | Secretary | 22 Jul 2016 | 16 Feb 2018 | - | - |
| John James Clarke | Director | 16 Feb 2011 | 1 Jan 2012 | British | 61 years |
| John Michael Douglas Young | Director | 8 Dec 2003 | 6 Jan 2009 | British | 74 years |
| John Michael Wright | Director | 1 Aug 2006 | 8 Jan 2009 | British | 70 years |
| Karen Veronica Hayzen-smith | Director | 1 May 2013 | 11 Oct 2016 | British | 56 years |
| Mark Justin Williams | Director | 1 Jan 2012 | 30 Apr 2013 | British | 49 years |
| Peter James Holland | Director | 8 Dec 2003 | 8 Dec 2003 | British | 79 years |
| Philip Henry Bourne | Director | 13 Jul 2011 | 31 Mar 2014 | British | 59 years |
| Pier Luis Chiti | Director | 1 May 2014 | 14 Oct 2019 | Italian | 61 years |
| Robert Matthew Bell | Director | 6 Feb 2006 | 27 Mar 2011 | British | 73 years |
| Susan Kaye Gregson | Director | 19 Mar 2009 | 13 Jul 2011 | British | 71 years |