Bio Details

Cynthia J. Warner

Cynthia Warner has served as President and Chief Executive Officer and as a director of Renewable Energy Group, Inc., an advanced biofuel producer, since January of 2019. Previously, Ms. Warner served as executive vice president of operations for Andeavor (formerly known as Tesoro Corporation) from August of 2016 until October of 2018, when Andeavor was acquired by Marathon Petroleum Corp. Prior to that, Ms. Warner served as Andeavor’s executive vice president of strategy and business development from October of 2014 to August of 2016. Ms. Warner previously served as chairman and chief executive officer of Sapphire Energy, Inc. She joined Sapphire Energy after a 25 year career at BP and Amoco, Inc. (prior to its acquisition by BP) where she gained significant knowledge of the global energy industry and served in numerous leadership roles, including overseeing BP’s global refining business and its health, safety, security and environment efforts. Ms. Warner received a bachelor of engineering in chemical engineering from Vanderbilt University and master of business administration from Illinois Institute of Technology.

Ms. Warner is a director of Sempra Energy.
Independent Director