BOGOTA, Colombia, Oct. 5 /PRNewswire-FirstCall/ -- Ecopetrol S.A. (NYSE: EC; BVC: ECOPETROL; BVL: EC; TSX: ECP) ("Ecopetrol" or the "Company"), has appointed Hector Manosalva Rojas as Executive Vice President of Exploration and Production. Mr. Manosalva Rojas replaces Nelson Navarrete, who retired f