LyondellBasell has appointed Tim Roberts has been named senior vice president, Olefins and Polyolefins for the Americas region. He will be based in Houston. Roberts most recently served as vice president of Planning and Development for Chevron Phillips Chemical.  

Prior to this, Roberts was president and CEO of Americas Styrenics, a joint venture between the Dow Chemical Company and Chevron Phillips Chemical. Roberts has worked for Chevron Phillips, its predecessors and/or joint ventures for more than 20 years. In that time he held a number of management positions with increasing responsibilities including global business manager, director of capital projects, and country manager in Qatar.