| Company | Timeline | Status | |
| Kerr Holdco Limited Director • Director | 21 Sep 2010←15 Years→Current | Active | |
| Compressed Air Contracts (Scotland) Limited Director • Engineer | 8 Feb 2008←17 Years→Current | Active | |
| ILK Properties Limited Director • Director | 1 Sep 1999←26 Years→Current | Active | |
| Kerr Compressor Engineers (East Kilbride) Limited Director • Engineer | 31 Dec 1988←36 Years→Current | Active | |
| Kerr Engineering & Fabrication Limited Director • Engineer | 31 Dec 1988←36 Years→Current | Active | |
