- AAA NCNU
- Academy of Health Care Professions
- Academy of Learning College
- Academy of Medical Surgical Nurses
- Academy of Natural Therapy
- Academy of Nurses Assistants
- Academy of Technology
- Accounting and Business School of the Rockies
- AchieveGlobal
- ACI Learning
- Acre School
- Aerosim Flight Academy
- Affiliated Computer Services Inc.
- Affinion Benefits Group
- AGTS Inc.
- AIB International School of Baking
- Alameda Contra Costa Transit District
- Albertsons, Inc.
- AlliedBarton Security Services LLC.
- Alstom Inc.
- Altec Service Group
- AMERCO
- American Academy of Ambulatory Care Nursing
- American Hotel and Lodging Educational Institute
- American Indian OIC
- American Institute for Paralegal Studies
- America's Health Insurance Plans
- Anamarc Educational Institute
- Ann Arbor Institute of Massage Therapy
- Ann & Robert H. Lurie Children’s Hospital of Chicago
- Apprentice Now
- Arizona Law Enforcement Academy
- Arizona School of Real Estate & Business
- Arizona Small Business Association
- Army Management Staff College
- Art Institute of Vancouver
- ASIS International
- Association of International Certified Professional Accountants (AICPA)
- Assured and Associates Training Institute of Georgia
- AT&T
- ATI Career Training Center
- Aurora Chamber of Commerce
- Aurora Police Department
- Austin Area Urban League
- Austin Police Department
- A'viands Culinary Academy