| Company | Timeline | Status | |
| Halcrow Group Limited Director • Chartered Engineer | 3 Apr 1998←4 Years→31 Mar 2003 | Active | |
| Halcrow Asia Limited Director • Chartered Engineer | 1 Dec 1992←10 Years→31 Mar 2003 | Active | |
Sir William Halcrow & Partners (Malaysia) Limited Director • Civil Engineer | 4 Sep 1992←1 Year 5 Months→2 Feb 1994 | Dissolved | |
| Sir William Halcrow & Partners Limited Director • Chartered Engineer | 15 Nov 1991←11 Years→31 Mar 2003 | Active | |
| Sir William Halcrow & Partners Limited Director • Unreported | 1 Jan 1970←33 Years→31 Mar 2003 | Active | |
