Geoff Chao, Ph.D., P.E. has over 30 years of geotechnical and construction engineering experience. He received his Master's and Ph.D. degrees from Colorado State University, Fort Collins, Colorado, USA, in 1995 and 2007, respectively.  He is currently the Department Head of the Civil and Infrastructure Engineering at the Asian Institute of Technology (AIT) in Bangkok, Thailand.  He is also currently the President of the Southeast Geotechnical Society.  Before joining AIT, he was the Vice President of Engineering Analytics, Inc., a geotechnical and environmental engineering consulting company in Fort Collins, Colorado, USA.  Dr. Chao has extensive experience in the areas of geotechnical and reclamation engineering design, construction and design defect investigations, ground improvement, construction remediation and mitigation, and construction oversight experience on a diversity of projects.  His technical specialties include expansive and collapsible soils evaluation, unsaturated soil modeling, soil/ground improvement methods, landslide/debris flow investigation, soil-foundation interaction, soil behavior under dynamic loadings, and mining reclamation.  Dr. Chao was an Adjunct Professor at Colorado State University. He is the co-author of a textbook titled “Foundation Engineering for Expansive Soils”, and he has authored over 50 technical papers, many of them dealing with structures on problematic soils