| Rol | Empresa | País | Estado | Período |
|---|---|---|---|---|
| Cargo | JOHNO RAIL LIMITED | 🇬🇧United Kingdom | Disuelta | 9/4/2026 – presente |
| Cargo | D JOHNSON MECHANICAL SERVICES LTD | 🇬🇧United Kingdom | Activa | 26/3/2026 – presente |
| Cargo | MOBILITY ASSIST LTD | 🇬🇧United Kingdom | Disuelta | 30/4/2026 – presente |
| Cargo | MORGAN CASTELL LTD | — | Disuelta | 20/4/2026 – presente |
| Cargo | JOHNSONS ELECTRICAL SERVICES LIMITED | 🇬🇧United Kingdom | Disuelta | 26/4/2026 – presente |
| Cargo | DENM JOHNSON LTD | 🇬🇧United Kingdom | Disuelta | 6/5/2026 – presente |
| Cargo | DMJ HEATING SERVICES LIMITED | 🇬🇧United Kingdom | Activa | 9/5/2026 – presente |
| Cargo | DJ GAS & HEATING LIMITED | — | Disuelta | 19/5/2026 – presente |
9/5/2026
Wales → England
6/5/2026
England → Wales
21/5/2012
appointed