| Company | Timeline | Status | |
| Ymddiriedolaeth Gerddi Hanesyddol Cymru - Welsh Historic Gardens Trust Director • None  | 4 Jun 2011←14 Years→Current  | Active  | |
| Ymddiriedolaeth Yr Hafod-Hafod Trust Director • Writer Researcher  | 22 Apr 2005←18 Years→27 Feb 2024  | Dissolved  | |
| Ymddiriedolaeth Gerddi Hanesyddol Cymru - Welsh Historic Gardens Trust Director • Writer/biologist  | 11 May 1996←1 Year 12 Months→9 May 1998  | Active  | |
| Ymddiriedolaeth Yr Hafod-Hafod Trust Director • Director  | 8 Sep 1995←2 Years 3 Months→31 Dec 1997  | Dissolved  | |
| OLD Stables, Tanybwlch, Residents Association Limited(The) Director • Unreported  | 14 Oct 1992←33 Years→Current  | Active  | |
| OLD Stables, Tanybwlch, Residents Association Limited(The) Secretary • Unreported  | 28 Jul 1992←33 Years→Current  | Active  | |
