| Company | Timeline | Status | |
Walstead Estates Limited Director • Geotechnical Engineer | 8 Dec 1991←18 Years→20 Nov 2010 | Dissolved | |
| Great Walstead Limited Director • Geotechnical Engineer | 8 Dec 1990←13 Years→27 Nov 2004 | Active | |
| Great Walstead Limited Director • Unreported | 1 Jan 1970←34 Years→27 Nov 2004 | Active | |
