| Service |
| Absolute Occupational Health Ltd |
| Ad Hoc Occupational Health Limited |
| Anglia OH |
| Ascenti Health |
| Asclepius OHS Ltd |
| Assured Occupational Health |
| Ayrshire Medical Services Ltd |
| Back in Action UK |
| Blackpool Council Occupational Health Service |
| Buckinghamshire Healthcare NHS Trust |
| Civil Nuclear Constabulary Occupational Health, Safety & Wellbeing |
| Co-Health |
| Collingwood Health Ltd |
| Compass Skills Training Limited |
| Connexus Health & Rehabilitation |
| ContourMC Ltd Occupational Health |
| County Durham and Darlington NHS Foundation Trust |
| CSG t/a Staff Care Services |
| D4 MEDICALS LTD |
| DAM HEALTH |