| Andrew Philip Pierpoint Miles | Director | 14 Jun 2019 | 24 Feb 2020 | British | 50 years |
| Asad Mohsin Ali | Director | 30 Nov 2016 | 24 Aug 2018 | British | 50 years |
| Boris Donatien Maxime Javelle | Director | 19 Apr 2016 | 14 Jun 2019 | French | 50 years |
| Ciara Martha Lynch | Director | 17 Apr 2020 | 11 Jan 2022 | Irish | 57 years |
| Jennifer Ann Jackson | Director | 30 Jun 2015 | 1 Apr 2020 | American | 72 years |
| Jerald Michael Korn | Director | 31 Jan 2019 | 14 Jun 2019 | American | 47 years |
| Jerome Charles Maurice Andries | Director | 27 Aug 2019 | 1 Mar 2023 | French | 56 years |
| Jill Dawn Anderson | Director | 1 Mar 2023 | 25 Jun 2024 | British | 61 years |
| Joseph Lawrence Farmer | Director | 1 Aug 2017 | 31 Jan 2019 | American | 53 years |
| Jr. Moulder | Director | 22 Dec 2011 | 1 Aug 2017 | American | 68 years |
| Marc Christian Bauer | Director | 24 Aug 2018 | 14 Jun 2019 | German | 49 years |
| Mary Lynne Hedley | Director | 22 Dec 2011 | 1 Aug 2017 | American | 63 years |
| Orlando Manuel Correia Monteiro De Oliveira | Director | 19 Apr 2016 | 14 Jun 2019 | Portuguese | 50 years |
| Richard John Latchford | Director | 14 Jun 2019 | 17 Apr 2020 | British | 46 years |
| Richard Joseph Rodgers | Director | 26 Oct 2012 | 31 Aug 2013 | United States | 59 years |
| Sisec Limited | Corporate Secretary | 22 Dec 2011 | 15 Aug 2016 | United Kingdom | - |
| Tanya Nicole Lewis | Director | 26 Oct 2012 | 30 Jun 2015 | United States | 55 years |
| Timothy Robert Pearson | Director | 1 Aug 2017 | 31 Jan 2019 | American | 58 years |
