Athos Construction Products Inc. (Canada)
Engineered Permits Inc. (United States)
GeoTek Inc. (United States)
Berti-Lindquist Consulting Engineers, Inc. (United States)
Dungan Engineering, P.A. (United States)
MWH Global (United States)
Prince Engineering PLC (United States)
Medina Consultants (United States)
Geoenvironmental Resources Inc. (United States)
Sampson Engineering Co. (United States)
Richard Kessler (United States)
Shannon Harty (United States)
Lainard Gray (United States)
Sampath Raghavan (United States)
Ashutosh Khandha (United States)
Con Truong (United States)
Hamar Laser Co. (United States)
Geotecnologia Co. (Colombia)
Rua Joaquim Tavora Co. (Brazil)
FCC Construcción de Centroamérica, S.A. Co. (Panama)
Quantum Geotechnical Ltd. (UK)
SeismoGeologisches Buero (Germany)
Eskisehir Osmangazi University - Dr. Volkan Okur (Turkey)
Luca Tomesani (Italy)
Studio Conti Associati (Italy)
Kalinka Vasileva (Bulgaria)
Cara SRL Ltd. (Romania)
Resource Development Consultants Ltd. (New Zeland)
United Soil Engineering Ltd. (Singapore)
Indian Institute of Science - Dr. P. Anbazhagan (India)
Mahadevan Krishnan (India)
Pastora Cabrera (Philippines)
E. H. Sison Engineers PLC (Philippines)
Flat Geo Co. (Vietnam)
Saudi Aramco (Saudi Arabia)
Blank Leher Consulting Engineers (Israel)
Zaid T Al-Khalid (Kuwait)
Tehran engineering and technical consulting organization (Iran)
Technical & Soil Mechanics Lab. of Road Ministry of Iran