| Company | Timeline | Status | |
| Hadwens Apartments Limited Director • Chartered Engineer | 13 Dec 2012←5 Years→22 Dec 2017 | Active | |
| Curtins Limited Director • Chartered Engineer | 13 Dec 2012←5 Years→22 Dec 2017 | Active | |
| Curtins Group Limited Director • Consulting Engineer | 5 Jun 1997←20 Years→22 Dec 2017 | Active | |
| Curtins Consulting Limited Director • Consulting Engineer | 1 Jan 1995←22 Years→22 Dec 2017 | Active | |
