| Company | Timeline | Status | |
| Bartington Instruments Limited Director • Archaeological Consultant | 20 Mar 1992←5 Years→3 Jun 1997 | Active | |
| Surrey Archaeological Society Director • Archaeological Scientist | 21 Dec 1991←5 Years→3 Jun 1997 | Active | |
| Surrey Archaeological Society Director • Unreported | 1 Jan 1970←27 Years→3 Jun 1997 | Active | |
