| Company | Timeline | Status | |
| Costain Oil, Gas & Process Limited Director • Director | 18 Mar 2022←3 Years→3 Nov 2025 | Active | |
| Brunswick Infrastructure Services Limited Director • Managing Director, Natural Resources, Co | 4 Jan 2022←3 Years→5 Aug 2025 | Dissolved | |
| Costain Upstream Limited Director • Director | 4 Jan 2022←3 Years→3 Nov 2025 | Active | |
| Calvert & Russell Ltd Director • Managing Director, Natural Resources, Co | 4 Jan 2022←3 Years→3 Nov 2025 | Active | |
| Construction Study Centre Limited Director • Managing Director, Natural Resources, Co | 4 Jan 2022←3 Years→3 Nov 2025 | Active | |
| Costain Integrated Services Limited Director • Managing Director, Natural Resources, Co | 4 Jan 2022←3 Years→3 Nov 2025 | Active | |
| Costain Limited Director • Managing Director, Natural Resources, Co | 4 Jan 2022←3 Years→3 Nov 2025 | Active | |
| ALC (FMC) Limited Director • Director | 30 Sep 2020←1 Year→30 Sep 2021 | Dissolved | |
| ALC (Holdco) Limited Director • Director | 3 Aug 2020←1 Year 1 Month→30 Sep 2021 | Dissolved | |
| ALC (SPC) Limited Director • Director | 3 Aug 2020←1 Year 1 Month→30 Sep 2021 | Dissolved | |
