| Company | Timeline | Status | |
| HDB Associates Ltd Director • Unreported | 6 Apr 2016←9 Years→Current | Active | |
| Woodward-Clyde Limited Director • Director | 1 Oct 2007←6 Years→12 Dec 2013 | Dissolved | |
| Dames & Moore Limited Director • Director | 1 Oct 2007←6 Years→12 Dec 2013 | Dissolved | |
| Thorburn Colquhoun Holdings Limited Director • Director | 1 Oct 2007←6 Years→12 Dec 2013 | Active | |
| HDB Associates Ltd Secretary • Unreported | 9 Feb 2006←19 Years→Current | Active | |
| URS Corporation Limited Director • Director | 15 Jan 2005←8 Years→12 Dec 2013 | Active | |
| URS Corporation Limited Director • Chartered Engineer | 1 May 2000←1 Year 6 Months→31 Oct 2001 | Active | |
