Bimal Mukhopadhyay, PhD, CPG, CGWP: Retired February, 2014 from the practice of geochemistry, geology and contaminant transport in groundwater after 40 years of services to the industry and the US Government, dealing with natural sciences technology R&D and academia; critical program development, direction and execution in the areas of environmental remediation of contaminated sites especially due to nuclear wastes; and, exploration and exploitation of natural resources (hydrocarbons and minerals such as radioactive, base- and precious metals).