Chairman and Chief Executive Officer, The Dow Chemical Company. Also serves as Executive Chairman, DowDuPont, a $73 billion holding company comprised of The Dow Chemical Company and DuPont with the intent to form independent, publicly traded companies in agriculture, materials science and specialty products sectors. As Executive Chairman, has lead responsibility for chairing the DowDuPont Board and, together with the DowDuPont CEO, is jointly responsible for quickly integrating the companies, capturing anticipated cost and revenue synergies and working to operate as independent divisions. Responsible for the Materials Sciences Division of DowDuPont. Chairs the Materials Sciences Advisory Committee. Advisory Committee oversight includes direct responsibility for the annual strategic plans of the Materials Science Division; establishment, execution and achievement of capturing the division's synergies; choice of leadership of the division; and the establishment, integration and operation of the division.