Tentamus North America Spotsylvania Avenue, Fredericksburg, Spotsylvania County, Virginia, United States Member since February 2, 2025
TÜV Rheinland of North America Southeast Otis Corley Drive, Bentonville, Benton County, Arkansas, United States Member since May 21, 2024
SEMx Materials Analysis Laboratory 27 Avenue Northeast, Calgary, Alberta, Canada Member since August 6, 2025
ProVerde Environmental Milford, Worcester County, Massachusetts, United States Member since October 28, 2025