| Company | Timeline | Status | |
| Keller Group Plc Director • Company Director | 21 Mar 1995←7 Years→9 May 2002 | Active | |
| Hochtief Aktiengesellschaft Director • Unreported | 20 Jan 1993←32 Years→Current | Active | |
| Hochtief (U.K.) Limited Director • Director | 4 Apr 1991←4 Years→26 Apr 1995 | Active | |
