| Company | Timeline | Status | |
| Maryburgh Amenities Company Limited Director • Environmental Engineer | 23 May 2014←1 Year 8 Months→20 Jan 2016 | Active | |
| Gunn Macphee & Associates Limited Director • Engineering Consultant | 30 Jun 2010←2 Years 5 Months→30 Nov 2012 | Dissolved | |
