| Company | Timeline | Status | |
| Halcrow Asia Partnership Limited Director • Chartered Engineer | 1 Dec 1991←2 Years 8 Months→19 Aug 1994 | Active | |
| Sir William Halcrow & Partners Limited Director • Chartered Engineer | 15 Nov 1991←2 Years 9 Months→19 Aug 1994 | Active | |
| Sir William Halcrow & Partners Limited Director • Unreported | 1 Jan 1970←24 Years→19 Aug 1994 | Active | |
