| Company | Timeline | Status | |
| D.B. Fluid Control Limited Director • Engineers Merchant | 13 May 1991←21 Years→1 Apr 2013 | Active | |
| D.B. Fluid Control Limited Secretary • Unreported | 13 May 1991←14 Years→30 Apr 2006 | Active | |
| Dawson-Bowman Limited Director • Engineers Agent | 11 Sep 1989←24 Years→7 Apr 2014 | Dissolved | |
