| Service |
| Advanced Occupational Health Medicals Ltd |
| Allied Milling and Baking |
| ARC Academy UK LTD |
| Armed Forces Defence Primary Health Care |
| Ashlands Occupational Health Ltd |
| Assured Occupational Health |
| Aston Martin |
| Avondale Construction |
| Babcock International Group |
| Back in Action UK |
| Barts Health NHS Trust |
| Bell Work Health Ltd |
| Black and Banton Occupational and Physical Health Services |
| Blackpool Council Occupational Health Service |
| British Gypsum |
| Building Health Ltd |
| Cheshire Shared Services Occupational Health Unit |
| CHI (Cork) |
| Choose Occupational Health |
| Civil Service Occupational Health Department |