Kees has a very broad experience and understanding of construction projects in Civil Engineering field with a specific water knowledge and experience in the areas of water table regulation &deep well pumping; subterranean water flow direction control through installation of steel or grout curtains; water drainage to reservoirs with subsequent drilling for filtered percolation; valley rainwater drainage and aquifer replenishment through dams with controlled overflow and filtered percolation drilling; and re-cycling of industrial waste waters.