Thom Neff, Ph.D., is president of OckhamKonsult, a strategic infrastructure management consulting practice, based in Boston. He has been involved in research, planning, design, construction and construction management for complex urban infrastructure projects throughout the world, many of which involved tunnels in urban areas. He is the creator of the STEPS Approach to risk management, a process that integrates Social, Technical, Economic, and Political aspects of uncertainty to avoid adverse project outcomes.