Alan J. Lutenegger has more than 35 years of practical experience in geotechnical engineering and has been professor at the University of Massachusetts for almost three decades. He has researched in situ testing and geotechnical site investigations, behaviour of deep and shallow foundations, ground improvement, collapsible and expansive soils, screw-piles and helical anchors and problematic soils. He is an Instructor for the National Highway Institute, FHWA, for professional training courses on design of shallow foundations and geotechnical subsurface investigations. He is a Professional Registered Engineer and has been an expert witness on a number of litigations involving ground movements and damage.