| Company | Timeline | Status | |
| Project Dewatering Limited Director • Director | 19 Jul 1999←12 Years→16 Jan 2012 | Active | |
| Nuwater Limited Director • University Professor | 19 Apr 1993←29 Years→14 Jun 2022 | Dissolved | |
| Environmental Measurements Limited Director • Company Chairman | 30 Aug 1991←34 Years→Current | Active | |
