| Company | Timeline | Status | |
| Stonepack Ltd Director • Quarrymaster | 7 Feb 2006←19 Years→Current | Active | |
| J & A Laird Limited Director • Concrete Products Manufacturer | 8 Sep 1989←36 Years→Current | Active | |
| Laird Aggregates Limited Director • Concrete Products Manufacturer | 8 Sep 1989←36 Years→Current | Active | |
| Laird Brothers (Forfar) Limited Director • Concrete Products Manufacturer | 8 Sep 1989←36 Years→Current | Active | |
