| Company | Timeline | Status | |
| R.T. Dunn Limited Director • Engineer | 28 Aug 2001←19 Years→17 Feb 2021 | Dissolved | |
| R. Dunn (Properties) Limited Director • Builder/engineer | 31 Jan 1992←29 Years→17 Feb 2021 | Active | |
| Rangescheme Limited Director • Director | 23 Dec 1991←28 Years→16 Apr 2020 | Active | |
