| Company | Timeline | Status | |
| Barrier-Matters Limited Director • Civil Engineer | 30 Jan 2013←12 Years→Current | Active | |
| Hill & Smith Infrastructure Limited Director • Director | 1 Jan 2001←12 Years→31 May 2013 | Active | |
| SDS Pipe Systems Limited Director • Director | 3 Feb 1997←16 Years→31 May 2013 | Active | |
| James Strang Limited Director • Civil Engineer | 1 Mar 1989←7 Years→31 Jan 1997 | Active | |
