| Company | Timeline | Status | |
| Carillion Support Services & Investments Limited Director • Corporate Body | 5 Oct 2007←4 Months→12 Feb 2008 | Liquidation | |
| Cwmorthin Slate Quarry 1994 Company Limited Director • Corporate Body | 12 Mar 2007←9 Months→24 Dec 2007 | Active | |
| Cocklebank Conservations Limited Director • Corporate Body | 12 Mar 2007←9 Months→24 Dec 2007 | Active | |
| Alfred McAlpine Slate Penrhyn Limited Director • Corporate Body | 12 Mar 2007←9 Months→24 Dec 2007 | Active | |
| CWT-Y-Bugail Slate Quarries,Limited(The) Director • Corporate Body | 12 Mar 2007←9 Months→24 Dec 2007 | Active | |
| Alfred McAlpine International Limited Director • Corporate Body | 31 Aug 2005←2 Years 5 Months→12 Feb 2008 | Liquidation | |
| Alfred McAlpine Plant (1984) Limited Director • Corporate Director | 31 Dec 2003←21 Years→Current | Active | |
Kennedy Utility Services (Scotland) Limited Director • Company | 1 Jun 2003←4 Years→12 Feb 2008 | Dissolved | |
Stiell Inframan Limited Director • Company | 1 Mar 2003←4 Years→12 Feb 2008 | Dissolved | |
| Marchwiel Investments Limited Director • Corporate Body | 16 Apr 2001←6 Years→12 Feb 2008 | Liquidation | |
