| Company | Timeline | Status | |
| Maclaren Roughton Ltd Director • Consulting Engineer | 1 Oct 1996←29 Years→Current | Active | |
| Roughton International Limited Director • Civil Engineer | 10 Aug 1991←1 Year 4 Months→4 Jan 1993 | Active | |
| Roughton & Partners Limited Director • Civil Engineer | 1 Jan 1970←23 Years→4 Jan 1993 | Active | |
