Managing Director, Jefferies LLC
William (Bill) Marko is a managing director of Jefferies LLC in the Energy Investment Banking Group. He has managed more than $60 billion of asset and corporate transactions, and his client base consists of many of the world's 50 largest oil and gas companies. Marko worked more than 18 years in various engineering, operations and commercial roles at Mobil Oil, followed by COO of Madison Energy Advisors. With more than 35 years of industry experience, he has evaluated transactions in all major U.S. basins and more than 70 countries. Marko is a registered Professional Engineer in Louisiana and is an active member of IPAA, currently serving on its SE Region Board, SPE, having previously served on the Gulf Coast Section (Houston) Board, and is on the Board of Tulane University School of Science & Engineering.