Dr. Petty has been serving as Deputy Legislative Director and Legislative Assistant on issues of water, natural resources, environment, science, technology and telecommunications and space for U.S. Senator James E. Risch of Idaho, a member of the Senate Committee on Energy and Natural Resources. Previously, Dr. Petty served as Acting Assistant Secretary and Deputy Assistant Secretary for Water & Science at DOI under President George W. Bush. He earned a Ph.D. from the University of Alaska Fairbanks; an M.S. from University of Maryland University College; and a B.S. from Purdue University (Indiana). Prior to his current Senate service, Dr. Petty worked for U.S. Senators Connie Mack of Florida and Rick Santorum of Pennsylvania. In addition, Dr. Petty worked in California and Indiana as a geologist and hydrogeologist.
https://www.whitehouse.gov/the-press-office/2017/11/13/president-donald-j-trump-announces-intent-nominate-personnel-key