| Rol | Empresa | País | Estado | Período |
|---|---|---|---|---|
| Cargo | CARRUTHERS BROTHERS OILS & ADDITIVES LTD | 🇬🇧United Kingdom | Activa | 16/3/2026 – presente |
| Cargo | DEEPSTREAM TECHNOLOGIES LIMITED | 🇬🇧United Kingdom | Activa | 23/3/2026 – 15/4/2019 |
| Cargo | ROSENBERG PROCESS TECHNOLOGY LTD | 🇬🇧United Kingdom | Activa | 29/4/2026 – presente |
| Cargo | PROXION SHALE REFINING UK LTD | — | Disuelta | 14/5/2026 – presente |
| Cargo | PROXION PROCESS LTD | 🇬🇧United Kingdom | Disuelta | 14/5/2026 – 9/9/2014 |
| Cargo | PROXION ENERGY GROUP LTD | 🇬🇧United Kingdom | Disuelta | 16/5/2026 – presente |
26/6/2025
appointed
15/4/2019
resigned
25/3/2013
appointed