David (Dave) R. Dunning, Fluor Corporation's executive vice president of Business Development & Strategy, has elected to retire from the company effective June 1, 2015. Dunning will begin a transition of his responsibilities immediately to Jose L. Martin de Bustamante, 51, currently serving as senior vice president, Business Development, Marketing & Strategic Planning for Energy & Chemicals. Bustamante will officially begin his new role on June 1 as Fluor's new executive vice president of Business Development & Strategy reporting to David T. Seaton, chairman and chief executive officer.