| Company | Timeline | Status | |
| Martian Engineering Limited Director • Unreported | 11 Aug 1997←28 Years→Current | Active | |
| Martian Engineering Limited Secretary • Audio Engineer | 11 Aug 1997←2 Years 11 Months→1 Aug 2000 | Active | |
| Deepdene Residents Association Limited Director • Sound Engineer | 19 Sep 1991←8 Months→12 Jun 1992 | Active | |
