| Company | Timeline | Status | |
| Bardsey Island Trust Limited(The) Director • University Lecturer | 27 Apr 1996←10 Years→20 May 2006 | Active | |
| Clwyd-Powys Archaeological Trust(The) Director • Self Employed Archaeologist | 12 Nov 1992←7 Years→18 Jul 2000 | Active | |
Institute Of Field Archaeologists(The) Director • Archaeologist | 16 Sep 1991←3 Years→14 Oct 1994 | Dissolved | |
| Council For British Archaeology(The) Director • Lecturer | 10 Jul 1991←3 Years→9 Jul 1994 | Active | |
| Clwyd-Powys Archaeological Trust(The) Director • Unreported | 1 Jan 1970←30 Years→18 Jul 2000 | Active | |
