Jason Leif represents energy industry participants, focusing on pipeline and liquefied natural gas (LNG) permitting and construction, rates and tariffs, asset acquisitions and divestitures, energy-related contracting matters, and investigations and compliance.

Jason has conducted internal investigations and worked with companies responding to inquiries from regulatory agencies, such as the Federal Energy Regulatory Commission (FERC) and the Commodity Futures Trading Commission (CFTC). He has represented companies in regulatory proceedings before FERC and state regulatory agencies. Jason has tried cases before FERC administrative law judges (ALJs), including matters involving the impact imported LNG could have on natural gas-fired electric turbines and gas distribution facilities and the valuation of crude oil shipped from Alaska's North Slope through the Trans Alaska Pipeline. Representative clients in public matters include BP, CenterPoint Energy, Chevron, and Scana.

Before joining Jones Day, Jason worked at the FERC, where he advised ALJs in litigation involving gas pipelines, oil pipelines, and electric utilities. He contributed to decisions regarding an electric utility merger, transmission tariffs, and rate design issues. Jason currently is president of the Energy Bar Association (EBA) and is a member of the boards of directors of the Charitable Foundation of the EBA and the Foundation for the Energy Law Journal. Jason is past president of the EBA's Houston Chapter, where he remains on the board, and was vice chair of its Natural Gas Regulation Committee. Jason is a member of the Texas Bar Association, the Houston Bar Association, and the Bar Association of the District of Columbia.