- Agile
- AHL Resourcing Solutions
- AJ Chambers
- Al Ghalia WLL
- Albatross Global Solutions
- Albion Recruitment
- Alchemy Recruitment
- Alegion Search & Selection Ltd
- Alex Flowers Limited
- Alexander Leigh Recruitment Ltd
- Aligra Personnel Limited
- All Ways Sales Ltd
- Alliance Consulting
- Alliance for recruitment
- Allied Ventures Ltd
- Alpha Labour & Recruitment
- Alpha Recruitment
- Altro Limited
- Amazon Personnel Limited
- Ambassador Holidays
- Amber Employment Services Ltd
- Amberstone Group
- Ambis Resourcing Partnership
- Amnis Technology Ltd
- AMR South Central
- Amsource Technology
- Ana-Nursing
- Anderson Browne Ltd
- Anderson Warwick Associates
- Anderson Wright Consulting Ltd