| Company | Timeline | Status | |
| WSP Cel Limited Director • Company Director | 15 Dec 2016←5 Months→26 May 2017 | Dissolved | |
| Merz And McLellan Consulting Engineers Limited Director • Company Director | 31 Jul 2016←9 Months→26 May 2017 | Dissolved | |
| Parsons Brinckerhoff Ltd Director • Company Director | 31 Jul 2016←9 Months→17 May 2017 | Active | |
| Birse Metro Limited Director • Managing Director | 5 Jul 2010←11 Months→17 Jun 2011 | Active | |
| Birse Rail Limited Director • Managing Director | 8 Jun 2010←1 Year→17 Jun 2011 | Dissolved | |
| Balfour Beatty Rail Infrastructure Services Limited Director • Managing Director | 17 Aug 2009←1 Year 10 Months→17 Jun 2011 | Active | |
| Balfour Beatty Rail Projects Limited Director • Managing Director | 17 Aug 2009←1 Year 10 Months→17 Jun 2011 | Active | |
| Balfour Beatty Rail Limited Director • Managing Director | 14 Aug 2009←1 Year 10 Months→17 Jun 2011 | Active | |
| Balfour Beatty Rail Track Systems Limited Director • Unreported | 1 Dec 2007←3 Years→17 Jun 2011 | Active | |
| Balfour Beatty Rail Technologies Limited Director • Engineer | 1 Dec 2007←3 Years→17 Jun 2011 | Active | |
