| Company | Timeline | Status | |
| Bathgate Walker Group Limited Director • Quarry Engineer | 31 Dec 1991←9 Months→30 Sep 1992 | Active | |
| Bathgate Silica Sand Limited Director • Quarry Engineer | 31 Dec 1991←9 Months→30 Sep 1992 | Active | |
| Arclid Transport Limited Director • Quarry Engineer | 6 Sep 1991←1 Year→30 Sep 1992 | Active | |
