| Company | Timeline | Status | |
| Levertonhelm (Holdings) Limited Director • Chief Technical Officer | 16 Sep 2024←1 Year 1 Month→Current | Active | |
| Levertonhelm Contracts Limited Director • Chief Technical Officer | 16 Sep 2024←1 Year 1 Month→Current | Active | |
| Levertonhelm Limited Director • Chief Technical Officer | 16 Sep 2024←1 Year 1 Month→Current | Active | |
| Levertonhelm Limited Director • Chemist | 2 Sep 2015←6 Years→29 Dec 2021 | Active | |
