| Company | Timeline | Status | |
| Halcrow Asia Partnership Limited Director • Chartered Engineer | 1 Nov 1993←1 Year 12 Months→31 Oct 1995 | Active | |
| Sir William Halcrow & Partners Limited Director • Chartered Engineer | 15 Nov 1991←6 Years→20 Apr 1998 | Active | |
| Sir William Halcrow & Partners Limited Director • Unreported | 1 Jan 1970←28 Years→20 Apr 1998 | Active | |
