| Company | Timeline | Status | |
| Aecom Limited Director • Consulting Engineer | 5 Mar 2002←1 Year 8 Months→15 Nov 2003 | Active | |
Oscar Faber Group Limited Director • Consultant Engineer | 1 Dec 2000←1 Year 10 Months→30 Sep 2002 | Dissolved | |
| Wilson Briggs & Sons Limited Director • Civil Engineer | 11 Oct 1991←16 Years→23 Nov 2007 | Active | |
