Jay Ameratunga has over thirty-five years' experience in geotechnical engineering. He graduated from the University of Ceylon, Sri Lanka, and obtained his master's at AIT, Bangkok, and Ph.D. from Monash University, Australia. Starting in 1989, he worked at Coffey Geotechnics for twenty-five years before moving to Golder Associates in 2015. Currently he is an independent consultant. While based in Australia, he has worked on projects in Australia, Indonesia, Malaysia, New Zealand, PNG, Singapore and Sri Lanka.

Nagaratnam Sivakugan is an associate professor at James Cook University, Australia. He graduated from University of Peradeniya with First-Class Honours and obtained an MSCE and PhD from Purdue University. He is a chartered professional engineer and a fellow of the American Society Civil Engineers and Engineers Australia. His publications include nine books, 150 journal articles and 100 papers in refereed conference proceedings. He serves in the editorial boards of a few journals, including Canadian Geotechnical Journal.

Braja Das is Dean Emeritus at California State University, Sacramento. He received his Ph.D. from the University of Wisconsin, Madison. He is a Fellow and Life Member of the American Society of Civil Engineers and a Life Member of the American Society for Engineering Education. He is the author and co-author of several geotechnical engineering text and reference books, and has more than 300 research papers published in journals and conference proceedings.