| Company | Timeline | Status | |
| Blackwell Earthmoving Limited Director • Director | 7 Dec 2020←4 Years→Current | Active | |
| Blackwell Earthmoving Limited Director • Director | 13 Feb 2020←1 Month→30 Mar 2020 | Active | |
| C.A. Blackwell Group Limited Director • Unreported | 1 Mar 2016←9 Years→Current | Active | |
| Geofirma Soils Engineering Limited Director • Quantity Surveyor | 17 Feb 2016←11 Months→10 Feb 2017 | Active | |
| C. A. Blackwell (Contracts) Limited Director • Unreported | 1 Nov 2010←15 Years→Current | Active | |
