| Company | Timeline | Status | |
| Halcrow Asia Partnership Limited Director • Chartered Engineer | 1 Nov 1995←1 Year 2 Months→1 Jan 1997 | Active | |
| Sir William Halcrow & Partners Limited Director • Chartered Engineer | 15 Nov 1991←13 Years→6 Dec 2004 | Active | |
| Sir William Halcrow & Partners Limited Director • Unreported | 1 Jan 1970←34 Years→6 Dec 2004 | Active | |
