The AABC Commissioning Group (ACG) is a non-profit association of certified commissioning authorities, dedicated to the advancement of professional, independent commissioning services through education, training, and certification of qualified architects and engineers.

Applicants for certification must have a thorough knowledge and understanding of the commissioning process, and demonstrate their ability to provide professional commissioning services in accordance with the ACG Commissioning Guideline. Through a detailed application and examination process, ACG awards the designation of Certified Commissioning Authority (CxA) to successful candidates, providing a meaningful commissioning credential that owners can request when selecting a qualified provider.