| Company | Timeline | Status | |
| Herweijer Limited Director • Architect | 11 Nov 2003←20 Years→20 Feb 2024 | Dissolved | |
| Rookcastle Limited Director • Architect | 18 Oct 1991←34 Years→Current | Active | |
| Rookcastle Limited Secretary • Unreported | 18 Oct 1991←34 Years→Current | Active | |
