| Company | Timeline | Status | |
| Alwyn Riddell Associates Ltd Director • Chartered Town Planner | 14 May 2002←17 Years→30 Oct 2019 | Dissolved | |
| Alwyn Riddell Associates Ltd Secretary • Unreported | 14 May 2002←17 Years→30 Oct 2019 | Dissolved | |
| Ostick & Williams Limited Director • Architect | 11 Feb 1999←4 Years→31 Mar 2003 | Active | |
