| Company | Timeline | Status | |
| McCallum Holdings Ltd Director • Director | 20 Sep 2017←6 Years→26 Sep 2023 | Active | |
| Worldmail Limited Secretary • Office Manager | 19 Apr 2005←20 Years→Current | Active | |
| A. McCallum (Properties) Limited Director • Secretary | 10 Dec 1993←31 Years→Current | Active | |
| A. McCallum (Properties) Limited Secretary • Secretary | 10 Dec 1993←31 Years→Current | Active | |
