| Alasdair Macdonald | Director | 9 Oct 2013 | 2 May 2017 | British | 61 years |
| Dale Brent Alderson | Director | 20 Jan 2015 | 21 Oct 2015 | British | 47 years |
| Eric James Lewis | Director | 28 Apr 2017 | 23 Nov 2018 | British | 79 years |
| Gareth Robertson Marshall | Director | 1 Feb 2018 | 31 Mar 2019 | British | 44 years |
| Gary Thirlwell | Director | 1 Apr 2019 | 1 Oct 2025 | British | 61 years |
| Jane Angela Caroline Gilbert Boot | Director | 1 Apr 2019 | 31 Jul 2023 | British | 44 years |
| John Garner | Director | 9 Oct 2013 | 1 Feb 2018 | British | 53 years |
| John Patterson | Director | 26 Feb 2018 | 31 Mar 2019 | British | 63 years |
| Mark James Morgan Bevan | Director | 1 Feb 2018 | 31 Mar 2019 | British | 57 years |
| Michael Blakey | Director | 2 Oct 2013 | 1 Feb 2018 | British | 58 years |
| Michael Denis Barker | Director | 18 Sept 2020 | 15 Jul 2022 | British | 50 years |
| Nigel Davison | Director | 2 Oct 2013 | 27 Apr 2017 | British | 62 years |
| Peter Mortimer Crossley | Director | 11 Jul 2013 | 2 Oct 2013 | British | 69 years |
| Robin Clive Powell | Director | 21 Oct 2015 | 18 Sept 2020 | British | 61 years |
| Squire Sanders Directors Limited | Corporate Director | 11 Jul 2013 | 2 Oct 2013 | United Kingdom | - |
| Squire Sanders Secretaries Limited | Corporate Secretary | 11 Jul 2013 | 2 Oct 2013 | United Kingdom | - |
| William Germaney | Director | 1 Apr 2019 | 1 Oct 2025 | British | 62 years |
