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Mark de Vaal is currently the Head of Sales in the Hospitality & Leisure sector at Holland Water. Mark previously held roles such as Verkoopleider at Aldi Zaandam B.V. and Districtleider at Aldi Culemborg B.V. Mark studied at Amsterdam University of Applied Sciences and Erfgooiers College. With Holland Water, Mark developed a unique water purification system based on copper and silver ionization to combat Legionella issues in buildings and cooling towers.