| Company | Timeline | Status | |
| Sheldon House Securities Limited Director • Chartered Civil Engineer | 11 Apr 2001←6 Years→10 Apr 2007 | Active | |
| Woodward-Clyde Limited Director • Civil Engineer | 1 May 1995←4 Years→28 May 1999 | Dissolved | |
| URS Corporation Limited Director • Civil Engineer | 24 Jan 1994←1 Year 3 Months→1 May 1995 | Active | |
