Sharon Tosi Lacey has served as the Chief Historian for the U.S. Census Bureau since June 2015. Previously, she spent 25 years as an officer in the U.S. Army and U.S. Army Reserves before retiring in 2015 as a Lieutenant Colonel. She holds a B.S. in Engineering Psychology from the United States Military Academy, an M.S. in Education from Long Island University, and a Ph.D. in History from the University of Leeds.