Mark Christie is a commissioner on the Federal Energy Regulatory Commission (FERC) in Washington, DC, USA. FERC is the federal regulator of the bulk power system in the USA, with authority over interstate transmission rates and wholesale electric power sales.

Prior to becoming a FERC commissioner in January 2021, Comm. Christie was a state regulator. He was the Chairman of the Virginia State Corporation Commission, on which he served for nearly 17 years. The Virginia commission regulates retail electric rates in Virginia, as well as exercising authority over the permitting of transmission and generation projects located in Virginia.

Christie taught regulatory law at the University of Virginia Law School and has extensive teaching experience internationally. He taught constitutional law at the China University of Political Science and Law (CUPL) in Beijing. He has lectured on electric and gas rate regulation at the Florence School of Regulation of the European University Institute. He has also taught energy regulation at Queen Mary University Law School in London.