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Mark was appointed GFL’s Executive Vice-President, Liquid Waste for the United States in August 2018. He brings a wealth of knowledge in the liquid waste industry and experience growing business operations through innovative approaches. Over his 30-year career, Mark has held senior leadership positions with high-profile organizations including Shell, where he served as General Manager, Specialities, for six years. He served as Executive Vice-President, Supply and Refinery Economics at Safety-Kleen, and immediately prior to joining GFL, he was President of Kleen Performance Products. Mark holds a Master’s degree in Technical Chemistry from Tecnische Univesität Braunschweig, Germany, and a Doctor of Philosophy in Chemical Engineering from Universität Hamburg, Germany.