| Company | Timeline | Status | |
| Laing O'Rourke Utilities Limited Director • Unreported | 27 May 2015←6 Months→9 Dec 2015 | Active | |
| Aecom Design Build (Holdings) Limited Director • Chartered Engineer | 1 Oct 2011←2 Years 7 Months→30 Apr 2014 | Active | |
Reid Crowther Consulting Ltd Director • Chartered Engineer | 1 Oct 2011←2 Years 7 Months→30 Apr 2014 | Dissolved | |
| Aecom Design Build Limited Director • Chartered Engineer | 1 Oct 2011←2 Years 7 Months→30 Apr 2014 | Active | |
BGP-Reid Crowther Limited Director • Chartered Engineer | 1 Oct 2011←2 Years 7 Months→30 Apr 2014 | Dissolved | |
| Byproduct Recovery Limited Director • Director | 24 May 2007←3 Years→23 Dec 2010 | Active | |
Stantec Treatment Holding Limited Director • Director | 2 Mar 2006←4 Years→23 Dec 2010 | Dissolved | |
| MWH Farrer Limited Director • Director | 2 Mar 2006←4 Years→23 Dec 2010 | Active | |
| Biwater Holdings Limited Director • Engineering Director | 25 Sep 2003←7 Years→14 Dec 2010 | Liquidation | |
| MWH Treatment Limited Director • Chairman | 1 Jan 2000←10 Years→23 Dec 2010 | Active | |
