| Company | Timeline | Status | |
| Ellipta Limited Director • Consulting Engineer | 8 Jan 2013←4 Years→28 Apr 2017 | Active | |
| Curtins Group Limited Director • Consulting Engineer | 5 Jun 1997←19 Years→23 Dec 2016 | Active | |
| Curtins Consulting Limited Director • Consulting Engineer | 1 Jan 1995←21 Years→23 Dec 2016 | Active | |
