LEE M. TILLMAN, SPE, was appointed president and CEO of Marathon Oil. Tillman began his career in the oil and gas industry at ExxonMobil in 1989 as a research engineer. He has operations management and leadership experience that included assignments in Indonesia, Scotland, Norway, Equatorial Guinea, Texas, and Louisiana. Most recently, he served as vice president of engineering at ExxonMobil Development Company, where he was responsible for global engineering staff engaged in major project concept selection, front-end design, and engineering. Tillman earned a BS in chemical engineering with honors from Texas A&M University and a PhD in chemical engineering from Auburn University.