Dr. Thushara Asela Madanayaka is a senior lecturer in geotechnical engineering of the Department of Civil Engineering at the Faculty of Engineering, General Sir John Kotelawala Defence University, Sri Lanka. He holds a PhD in Geotechnical Engineering from James Cook University, Australia, and a M.Eng in Geotechnical Engineering and bachelor’s degree in Mining Engineering from the University of Moratuwa, Sri Lanka. With over 17 years of combined academic and industry experience, his research focuses on analytical and semi-analytical modelling of seepage, with particular emphasis on method of fragments based seepage solutions, engineering behaviour of fine and coarse grained soils, and shear strength characterization of sandy soils. Dr. Nagaratnam Sivakugan received his bachelor’s degree in civil engineering from the University of Peradeniya, Sri Lanka, with First Class Honours. He earned his MSCE and PhD from Purdue University, West Lafayette, Indiana, US. As a registered professional engineer of Queensland and a Chartered Professional Engineer, he has done substantial consulting work for the geotechnical and mining industries in Australia and overseas, including the World Bank.