Casey previously served as executive vice-president, operations, where he oversaw Tesoro’s refining, marketing, logistics, and environment, health, safety, and security groups. He joined Tesoro in 2013 as senior vice-president, strategy and business development after serving as vice-president, BP products North America at the Texas City refinery.
Prior to her new role, Warner served as Tesoro’s vice-president, strategy and business development, where she led the company’s strategic growth initiatives. She joined Tesoro in 2014, bringing more than 30 years of experience in energy, oil refining and marketing, and related technology development.
Steven Sterin, former executive vice-president, chief financial officer, has added corporate development to his existing duties. He joined Tesoro in 2014, bringing more than 15 years of financial leadership in the chemicals industry.