| Company | Timeline | Status | |
| Campbell Associates Limited Director • Company Director | 31 Oct 2018←2 Years 2 Months→19 Jan 2021 | Active | |
| Campbell Associates Limited Secretary • Unreported | 11 Feb 2003←3 Years→20 Jul 2006 | Active | |
| Campbell Associates Limited Director • Acoustic Engineer | 29 Oct 2001←4 Years→20 Jul 2006 | Active | |
