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Zaadnoordijk, Willem Jan was born on April 17, 1959 in Alkmaar, Netherlands.
Degree in Civil Engineering, Delft University of Technology, Netherlands, 1983. Doctor of Philosophy, University Minnesota, Minneapolis, 1988.
Geohydrologist Royal Haskoning, Rotterdam, Netherlands, since 1989.
Willem Jan Zaadnoordijk has been listed as a noteworthy geologist by Marquis Who's Who.