| Company | Timeline | Status | |
| Crummock Surfacing Ltd Director • Director | 10 Apr 2013←5 Years→2 Aug 2018 | Active | |
| Civil Engineering Contractors Association (Scotland) Director • Civil Engineer | 28 Feb 2013←5 Years→8 Oct 2018 | Active | |
| Crummock Limited Director • Civil Engineer | 13 Jan 1997←28 Years→Current | Liquidation | |
| Crummock Holdings Limited Director • Civil Engineer | 22 Jul 1994←31 Years→Current | Liquidation | |
| Crummock (Scotland) Limited Director • Civil Engineer | 1 Jan 1994←31 Years→Current | Liquidation | |
