| Company | Timeline | Status | |
| Cullen Timber Design (Oak) Limited Director • Timber Frame Design | 11 Feb 2025←8 Months→Current | Active | |
| Cullen Timber Design Limited Director • Timber Frame Design | 3 Dec 2007←17 Years→Current | Active | |
| Cullen Timber Design Limited Secretary • Timber Frame Design | 3 Dec 2007←17 Years→Current | Active | |
