| Company | Timeline | Status | |
| Tamsyn Mason Design Ltd Director • Director | 4 Mar 2025←8 Months→Current | Active | |
| Tamsyn Mason Interior Design Studio Ltd Director • Director | 10 Sep 2023←2 Years 1 Month→Current | Active | |
| RJC Consulting Limited Director • Director | 17 Mar 2015←10 Years→Current | Active | |
