| Company | Timeline | Status | |
| Rsa Geotechnics Holdings Limited Director • Director | 17 Mar 2011←14 Years→Current | Active | |
Environmental Interface Limited Director • Engineer | 1 Jul 1998←16 Years→26 May 2015 | Dissolved | |
Environmental Interface Limited Secretary • Engineer | 1 Jul 1998←16 Years→26 May 2015 | Dissolved | |
| R S A Geotechnics Limited Secretary • Director | 30 Jan 1996←21 Years→30 Apr 2017 | Liquidation | |
| R S A Geotechnics Limited Director • Director | 30 Jul 1991←34 Years→Current | Liquidation | |
