| Company | Timeline | Status | |
| Robert Hart Construction Limited Director • Accountant | 31 May 1996←1 Year 9 Months→14 Mar 1998 | Active | |
| Amboh Properties Limited Director • Accountant | 31 May 1996←1 Year 9 Months→14 Mar 1998 | Active | |
| Robert Hart & Sons Limited Director • Accountant | 31 May 1996←1 Year 9 Months→1 Mar 1998 | Active | |
