| Company | Timeline | Status | |
| Bark Products (Scotland) Limited Director • Company Director  | 29 Nov 1994←7 Years→1 May 2002  | Active  | |
| Boothby & Penicuik Peat Company Limited Director • Company Director  | 28 Jan 1994←1 Year 8 Months→3 Oct 1995  | Dissolved  | |
William Sinclair Holdings Public Limited Company Director • Company Director  | 16 Sep 1993←4 Years→12 May 1998  | Dissolved  | |
William Sinclair Horticulture Limited Director • Director  | 20 Oct 1992←9 Years→1 May 2002  | Dissolved  | |
| Boothby & Penicuik Peat Company Limited Director • Manager  | 9 Mar 1989←2 Years 11 Months→29 Feb 1992  | Dissolved  | |
