| Company | Timeline | Status | |
| The Richard Demarco Foundation Director • Engineer | 31 Dec 1989←3 Years→10 Jun 1993 | Active | |
Viz Limited Director • Engineer | 11 Aug 1989←14 Years→23 Dec 2003 | Dissolved | |
| Mactaggart, Scott & Company Limited Director • Engineer | 4 Jan 1989←14 Years→23 Dec 2003 | Active | |
| Macscott Bond Limited Director • Engineer | 4 Jan 1989←12 Years→1 Jan 2001 | Active | |
| Hillwood Investments Limited Director • Engineer | 4 Jan 1989←14 Years→23 Dec 2003 | Active | |
