| Company | Timeline | Status | |
| George Leslie Limited Director • Chartered Civil Engineer | 15 Aug 2003←16 Years→17 Sep 2019 | Active | |
| George Leslie Plant Limited Director • Charterd Civil Engineer | 28 Aug 2001←18 Years→17 Sep 2019 | Active | |
| Scott-Orr (Contractors) Limited Director • Civil Engineer | 30 Apr 1999←11 Months→7 Apr 2000 | Active | |
| R.J. McLeod (Contractors) Limited Director • Civil Engineer | 1 Nov 1993←6 Years→7 Apr 2000 | Active | |
