ACS has provided regulatory assistance for many clients who requested an avenue to discuss alternatives or recommendations. In many of those cases, ACS has not required a fee or stipend in providing advice.

Since the establishment of ACS in 2004, ACS has dedicated its resources to the following clients. These are:

• Human Technologies Incorporated, McClean, Virginia
• Federal Aviation Administration, (FAA) Washington D.C.
• U.S. Trade and Development Agency (USTDA), Washington D.C.
• General Electric, Small Commercial Engine Operation, Cincinnati, Ohio
• China Aviation Cooperation Program (APC), Beijing, China
• Civil Aviation Authority of China
• General Electric, Beijing, PRC China
• Parker Aerospace Irvine, California
• Hamilton Sundstrand, Shanghai, PRC China
• ASCEE (Airplane Safety & Certification Evaluation and Enhancement), Kent, Washington
• CAG (Certification Aircraft Group), Seattle, Washington
• General Electric Aviation, Evendale, Ohio