| Company | Timeline | Status | |
| Green Shoots Land Ltd Director • Director | 2 Mar 2012←13 Years→Current | Active | |
| Murdoch Mackenzie Limited Director • Quarry Engineer | 9 Jul 1996←29 Years→Current | Active | |
| Tinto Sand And Gravel Limited Director • Quarry Engineer | 29 Apr 1992←33 Years→Current | Active | |
Walter Arnott & Son Limited Director • Quarry Engineer | 29 Apr 1992←28 Years→22 Sep 2020 | Dissolved | |
