| Company | Timeline | Status | |
| Sub Surface South East Limited Director • Chartered Civil Engineer | 28 May 2025←6 Months→Current | Active | |
| Sub Surface Laboratories Limited Director • Chartered Civil Engineer | 28 May 2025←6 Months→Current | Active | |
| Sub Surface Consultants Limited Director • Chartered Civil Engineer | 28 May 2025←6 Months→Current | Active | |
| Sub Surface North East Limited Director • Chartered Civil Engineer | 28 May 2025←6 Months→Current | Active | |
| Sub Surface Midlands Limited Director • Chartered Civil Engineer | 28 May 2025←6 Months→Current | Active | |
| Clifford Marsden Services Limited Director • Chartered Civil Engineer | 28 May 2025←6 Months→Current | Active | |
| Sub Surface Limited Director • Chartered Civil Engineer | 28 May 2025←6 Months→Current | Active | |
