| Role | Company | Country | Status | Date Range |
|---|---|---|---|---|
| Officer | FRONTIER ONCOLOGY LIMITED | 🇬🇧Regno Unito | Active | 12/05/2026 – 19/12/2021 |
| Officer | CETROMED MANAGEMENT LIMITED | 🇬🇧Regno Unito | Dissolved | 12/05/2026 – present |
| Officer | ANTROTEC I.T. LIMITED | 🇬🇧Regno Unito | Dissolved | 12/05/2026 – present |
| Officer | CELLTONE SYSTEMS LIMITED | 🇬🇧Regno Unito | Dissolved | 12/05/2026 – present |
| Officer | IXEUNITE LIMITED | 🇬🇧Regno Unito | Dissolved | 12/05/2026 – present |
| Officer | FRONTIER BIOSCIENCES LIMITED | 🇬🇧Regno Unito | Active | 12/05/2026 – 19/12/2021 |
| Officer | GADMAN INVESTMENTS LIMITED | 🇬🇧Regno Unito | Dissolved | 12/05/2026 – present |
| Officer | AKMEN LIMITED | 🇬🇧Regno Unito | Dissolved | 12/05/2026 – present |
| Officer | FRONTIER METABOLICS LIMITED | 🇬🇧Regno Unito | Dissolved | 14/01/2026 – present |
| Officer | FRONTIER METABOLICS LIMITED | 🇬🇧Regno Unito | Dissolved | 14/01/2026 – present |
| Officer | NECROTRACER LIMITED | 🇬🇧Regno Unito | Dissolved | 11/03/2026 – present |
| Officer | ONCOCIDIA LIMITED | 🇬🇧Regno Unito | Active | 12/05/2026 – present |
| Officer | FRONTIER ONCOLOGY LIMITED | 🇬🇧Regno Unito | Active | 12/05/2026 – 22/03/2019 |
| Officer | GADMAN INVESTMENTS LIMITED | 🇬🇧Regno Unito | Dissolved | 12/05/2026 – present |
| Officer | CELLTONE SYSTEMS LIMITED | 🇬🇧Regno Unito | Dissolved | 12/05/2026 – present |
| Officer | IXEUNITE LIMITED | 🇬🇧Regno Unito | Dissolved | 12/05/2026 – present |
| Officer | ANTROTEC I.T. LIMITED | 🇬🇧Regno Unito | Dissolved | 12/05/2026 – present |
| Officer | AKMEN LIMITED | 🇬🇧Regno Unito | Dissolved | 12/05/2026 – present |
| Officer | CETROMED MANAGEMENT LIMITED | 🇬🇧Regno Unito | Dissolved | 12/05/2026 – 22/03/2019 |
| Officer | CETROMED LIMITED | 🇬🇧Regno Unito | Active | 12/05/2026 – 19/12/2021 |
| Officer | FRONTIER BIOSCIENCES LIMITED | 🇬🇧Regno Unito | Active | 12/05/2026 – 19/12/2021 |
19/12/2021
resigned
22/03/2019
resigned
30/11/2015
appointed