Chevron Phillips Chemical Co. LLC made several senior management changes, effective Jan. 1, 2012.
Mark Lashier, currently senior vice-president, specialties, aromatics and styrenics, has been elected executive vice-president, olefins and polyolefins.
Dan Coombs, currently vice-president, corporate planning and development, will become senior vice-president, specialties, aromatics and styrenics.
Ron Corn, currently vice-president, olefins and NGL, will assume the position of vice-president, corporate planning and development.
David S. Smith, currently vice-president, polyethylene, will become vice-president, olefins and NGL.