| Service | Certificate date |
| 2gether NHS Foundation Trust |
16/06/2017
|
| 5 Boroughs Partnership NHS Foundation Trust |
10/05/2018
Accredited since: October 2012
|
| ACI Training and Consultancy Ltd |
30/11/2015
|
| Acorn Occupational Health Ltd |
27/10/2017
Accredited since: February 2012
|
| Aintree University Hospital NHS Foundation Trust |
09/03/2018
Accredited since: July 2012
|
| Airbus Defence and Space |
30/03/2017
Accredited since: July 2011
|
| Alere Healthcare Connections Limited |
03/01/2020
Accredited since: October 2014
|
| Alere Healthcare Connections Limited - London |
03/01/2020
|
| An Post Occupational Health & Support |
01/07/2016
|
| Arumas Health Services |
22/06/2015
|
| Ashford and St Peters Hospitals NHS Foundation Trust |
28/06/2018
Accredited since: September 2012
|
| Avon Partnership NHS OH Service |
08/06/2018
Accredited since: December 2012
|
| AWL Occupational Health Ltd |
09/12/2015
|
| AXA ICAS |
12/04/2019
Accredited since: August 2013
|
| Barking Havering & Redbridge Hospitals NHS Trust |
20/02/2015
|
| Barnsley Hospital NHS Foundation Trust |
19/06/2019
Accredited since: September 2013
|
| Belfast Health and Social Care Trust |
19/08/2016
|
| BHSF OH Ltd |
11/04/2017
|
| Birmingham City Council |
28/10/2019
Accredited since: January 2014
|
| Blackpool Teaching Hospital NHS Foundation Trust Staff Health and Wellbeing Centre |
30/08/2018
Accredited since: September 2012
|