David T. Dyjack, Dr.PH, CIH is Chief Executive Officer of the U.S. National Environmental Health Association (NEHA). Dyjack has been dean of an accredited school of public health, health director for an international non-governmental organization, and a consultant to private sector organizations such as Exxon, Saudi Aramco, and Ford Motor Company. David earned a doctorate in public health from the University of Michigan, an MSPH from the University of Utah, and is a board-certified industrial hygienist (CIH).