| Company | Timeline | Status | |
| Campbell Traffic Management Limited Director • Unreported | 29 Jan 2025←9 Months→Current | Active | |
| Campbell TM Ltd Director • Manager | 1 Mar 2021←3 Years→29 Oct 2024 | Dissolved | |
Campbell Highways Ltd Director • Director | 26 Nov 2014←2 Years 5 Months→9 May 2017 | Dissolved | |
