| Company | Timeline | Status | |
| R.H. Mawson (Engineers) Limited Secretary • Engineer | 1 Apr 1993←32 Years→Current | Active | |
| R.H. Mawson (Engineers) Limited Director • Engineer | 14 Mar 1992←33 Years→Current | Active | |
| R.H. Mawson (Engineers) Limited Director • Unreported | 1 Jan 1970←56 Years→Current | Active | |
