| Company | Timeline | Status | |
| MTD Spreadsheet Limited Director • Chartered Accountant | 27 Jun 2018←7 Years→Current | Active | |
| PMCA Limited Director • Chartered Accountant | 1 Mar 2011←14 Years→Current | Active | |
| URS Europe Limited Director • Accountant | 23 Oct 2001←3 Months→31 Jan 2002 | Active | |
| Woodward-Clyde Limited Director • Accountant | 15 Aug 2000←1 Year 10 Months→30 Jun 2002 | Dissolved | |
| URS Corporation Limited Director • Accountant | 15 Aug 2000←1 Year 5 Months→31 Jan 2002 | Active | |
| Thorburn Colquhoun Holdings Limited Director • Accountant | 15 Aug 2000←1 Year 5 Months→5 Feb 2002 | Active | |
| Artsill Limited Director • Accountant | 9 Jul 1998←27 Years→Current | Active | |
