| Officer | AMENTUM ENTERPRISE ASSET SOLUTIONS LIMITED | 🇬🇧Regno Unito | Active | 21/04/2026 – 01/06/2024 |
| Officer | TRANSCEND PARTNERS LIMITED | 🇬🇧Regno Unito | Active | 01/06/2026 – present |
| Officer | AMENTUM E&C LIMITED | 🇬🇧Regno Unito | Active | 21/04/2026 – 01/06/2024 |
| Officer | JACOBS CANADA (UK) LIMITED | 🇬🇧Regno Unito | Dissolved | 28/03/2026 – present |
| Officer | AMENTUM CLEAN ENERGY LIMITED | 🇬🇧Regno Unito | Active | 21/04/2026 – 01/06/2024 |
| Officer | JEG ACQUISITION COMPANY LIMITED | 🇬🇧Regno Unito | Active | 03/06/2026 – present |
| Officer | CH2M HILL ONE LIMITED | 🇬🇧Regno Unito | Dissolved | 06/04/2026 – present |
| Officer | JACOBS SINGAPORE (UK) LIMITED | 🇬🇧Regno Unito | Dissolved | 28/03/2026 – present |
| Officer | AMENTUM CLEAN ENERGY INTERNATIONAL LIMITED | 🇬🇧Regno Unito | Active | 29/12/2025 – 01/06/2024 |
| Officer | AMENTUM ENTERPRISE ASSET SOLUTIONS CONSTRUCTION LIMITED | 🇬🇧Regno Unito | Active | 21/04/2026 – 01/06/2024 |
| Officer | CH2M HILL EUROPE LIMITED | 🇬🇧Regno Unito | Active | 27/05/2026 – present |
| Officer | LEIGHFISHER HOLDINGS LIMITED | 🇬🇧Regno Unito | Dissolved | 25/05/2026 – present |
| Officer | JACOBS EUROPE HOLDCO LIMITED | 🇬🇧Regno Unito | Active | 09/05/2026 – present |
| Officer | AMENTUM INTERNATIONAL NUCLEAR SERVICES LIMITED | 🇬🇧Regno Unito | Active | 21/04/2026 – 01/06/2024 |
| Officer | CH2M HILL HOLDINGS LIMITED | 🇬🇧Regno Unito | Active | 05/04/2026 – present |
| Officer | ENERGY, SAFETY AND RISK CONSULTANTS (UK) LIMITED | 🇬🇧Regno Unito | Active | 29/12/2025 – 01/06/2024 |
| Officer | HALCROW (CONSULTING ENGINEERS & ARCHITECTS) LIMITED | 🇬🇧Regno Unito | Active | 06/02/2026 – present |
| Officer | NATIONAL NUCLEAR CORPORATION LIMITED | 🇬🇧Regno Unito | Active | 25/03/2026 – 01/06/2024 |
| Officer | SIR WILLIAM HALCROW & PARTNERS LIMITED | 🇬🇧Regno Unito | Active | 31/12/2025 – 17/02/2014 |
| Officer | HALCROW CONSULTING LIMITED | 🇬🇧Regno Unito | Dissolved | 10/12/2025 – 17/02/2014 |
