| Role | Company | Country | Status | Date Range |
|---|---|---|---|---|
| Officer | KCA DEUTAG ALPHA II LIMITED | — | Dissolved | 05/06/2026 – 28/09/2010 |
| Officer | KCA DEUTAG ALPHA LIMITED | 🇬🇧United Kingdom | Active | 05/06/2026 – 06/02/2009 |
| Officer | KCA DEUTAG ALPHA LIMITED | 🇬🇧United Kingdom | Active | 05/06/2026 – 28/09/2010 |
| Officer | TURBO GAMMA LIMITED | — | Dissolved | 05/06/2026 – 06/02/2009 |
| Officer | TURBO BETA PLC | — | Dissolved | 05/06/2026 – 28/09/2010 |
| Officer | TURBO BETA PLC | — | Dissolved | 05/06/2026 – 06/02/2009 |
| Officer | TURBO GAMMA LIMITED | — | Dissolved | 05/06/2026 – 28/09/2010 |
28/09/2010
resigned
06/02/2009
resigned
29/11/2007
appointed