| Service |
| Anvil Group |
| Ascenti Health |
| Ashlands Occupational Health Ltd |
| Avondale Construction |
| Ayrshire Medical Services Ltd |
| Back in Action UK |
| Barts Health NHS Trust |
| Bedford Occupational Health and Well Being Centre |
| Bell Work Health Ltd |
| Black and Banton Occupational and Physical Health Services |
| Blackpool Council Occupational Health Service |
| BMI Healthcare Ltd |
| British Gypsum |
| Buckinghamshire Healthcare NHS Trust |
| Carmarthenshire County Council |
| Choose Occupational Health |
| Civil Service Occupational Health Department |
| Co-Health Ltd |
| Colchester University Hospital NHS Foundation Trust |
| Company Health Services Ltd |