| Company | Timeline | Status | |
| Environmental Building Solutions Limited Director • Unreported | 9 Dec 1998←27 Years→Current | Active | |
| Hutton + Rostron Environmental Investigations Limited Director • Mycologist | 21 Nov 1992←9 Months→1 Sep 1993 | Active | |
Fungal Control Systems Limited Director • Scientist | 23 Feb 1992←1 Year 6 Months→1 Sep 1993 | Dissolved | |
| Hutton + Rostron Environmental Investigations Limited Director • Unreported | 1 Jan 1970←23 Years→1 Sep 1993 | Active | |
