| Company | Timeline | Status | |
| KHR Holding Company Limited Director • Consultant Engineer | 11 Nov 2008←7 Years→11 Dec 2015 | Active | |
| K.H.R. Company Limited Director • Consultant Engineer | 10 Dec 1991←24 Years→11 Dec 2015 | Active | |
| The British-German Association Director • Company Director/engineer | 18 Apr 1991←1 Year 11 Months→1 Apr 1993 | Active | |
