| Company | Timeline | Status | |
| Sub Surface South East Limited Secretary • Chartered Civil Engineer | 24 Jun 2004←21 Years→Current | Active | |
| Sub Surface South East Limited Director • Unreported | 24 Jun 2004←21 Years→Current | Active | |
| Sub Surface Laboratories Limited Director • Unreported | 27 Feb 1996←29 Years→Current | Active | |
| Sub Surface North West Limited Director • Unreported | 27 Feb 1996←29 Years→Current | Active | |
| Sub Surface Consultants Limited Director • Unreported | 22 Dec 1995←29 Years→Current | Active | |
| Sub Surface North East Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Sub Surface Midlands Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Clifford Marsden Services Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Sub Surface Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
