| Rol | Empresa | País | Estado | Período |
|---|---|---|---|---|
| Cargo | DECARBONISE FUEL LIMITED | 🇬🇧United Kingdom | Activa | 7/4/2026 – presente |
| Cargo | GAS VEHICLE ALLIANCE LIMITED | — | Disuelta | 23/5/2026 – 31/12/2019 |
| Cargo | GAS ALLIANCE SOLUTIONS HOLDINGS LIMITED | — | Disuelta | 23/5/2026 – 31/12/2019 |
| Cargo | ENSYSCO LIMITED | 🇬🇧United Kingdom | Disuelta | 23/4/2026 – presente |
| Cargo | WICKS FARM (BIOGAS) LTD | 🇬🇧United Kingdom | Disuelta | 4/5/2026 – 20/6/2015 |
| Cargo | BIOMETHANE (CASTLE EATON) LIMITED | 🇬🇧United Kingdom | Activa | 5/5/2026 – 17/1/2017 |
12/5/2020
appointed
31/12/2019
resigned
26/3/2015
appointed