| Company | Timeline | Status | |
| Lambert Energy Advisory Limited Director • Consultant | 25 Nov 1999←25 Years→Current | Active | |
| Commerzbank Finance Limited Director • Investment Banker | 1 Apr 1994←4 Years→18 Dec 1998 | Active | |
| Garthgwynion Estate Limited Director • Energy Adviser | 18 Dec 1991←33 Years→Current | Active | |
| Commerzbank Securities Limited Director • Stockbroker | 1 Jan 1970←24 Years→1 Apr 1994 | Dissolved | |
