David S. Jonas is a United States Marine, lawyer, and government official who is currently a partner at Fluet, Huber & Hoang. In 2017, he was nominated by President Donald Trump to become General Counsel at the United States Department of Energy, but Jonas withdrew from consideration in January 2018. He served for twenty years in the United States Marine Corps. During the administration of George W. Bush, Jonas served as The Pentagon's nuclear nonproliferation planner for the Joint Chiefs of Staff prior to becoming General Counsel of the National Nuclear Security Administration and the Defense Nuclear Facilities Safety Board. He was awarded the Defense Meritorious Service Medal for his work with the Joint Chiefs from 1997 to 2001.