| Asa Daniel Parker | Director | 23 Jul 2013 | 3 Jan 2018 | British | 53 years |
| Carillion Secretariat Limited | Corporate Secretary | 1 Mar 2006 | 18 Sept 2012 | United Kingdom | - |
| David Stuart Hurcomb | Director | 4 Jul 2006 | 8 Dec 2009 | British | 62 years |
| Matthew Clement Hugh Gill | Director | 24 Nov 2010 | 21 Jul 2011 | British | 55 years |
| Michael Harrison Kasher | Director | 21 Jul 2011 | 23 Jul 2013 | British | 61 years |
| Mitre Directors Limited | Corporate Director | 9 Feb 2006 | 22 Mar 2006 | United Kingdom | - |
| Mitre Secretaries Limited | Corporate Director | 9 Feb 2006 | 22 Mar 2006 | United Kingdom | - |
| Mitre Secretaries Limited | Corporate Secretary | 9 Feb 2006 | 22 Mar 2006 | United Kingdom | - |
| Mowlem Secretariat Limited | Corporate Secretary | 1 Mar 2006 | 24 May 2006 | - | - |
| Nicholas Anthony Doherty | Director | 8 Mar 2006 | 29 Jul 2008 | British | 61 years |
| Peter Austin Cragg | Director | 8 Mar 2006 | 4 Jul 2006 | British | 71 years |
| Philip Ernest Shepley | Director | 20 Feb 2017 | 7 Dec 2017 | British | 53 years |
| Richard Gregg Lumby | Director | 4 Jul 2006 | 20 Feb 2017 | British | 65 years |
| Richard John Howson | Director | 10 Dec 2009 | 15 Jan 2018 | British | 58 years |
| Rodney Hewer Harris | Director | 25 Aug 2006 | 28 Sept 2010 | British | 65 years |
| Stephen Edwin Nickson | Director | 8 Mar 2006 | 23 May 2006 | British | 72 years |
| Timothy Francis George | Secretary | 18 Sept 2012 | 30 Jun 2017 | - | - |