Mr. Sprinkle, after 10 years working across the United States as a private sector historic preservation consultant, he served as a historian at the headquarters of the National Park Service from 1989 to 2022. Mr. Sprinkle, is currently a Lecturer at the University of Maryland's School for Architecture, Planning, and Preservation where he has taught a variety of courses for over a decade. He holds a doctorate in American history and a master’s degree in historical archaeology from the College of William and Mary. Mr. Sprinkle is the author of three books on the evolution of American historic preservation: Crafting the Preservation Criteria: The Origins of the National Register of Historic Places (2014); Saving Space: Historic Land Conservation in the United States (2018); and, Heritage Conservation in the United States: Enhancing the Presence of the Past (2023). A director of the Historic Alexandria Foundation, he served on the Alexandria, Virginia Architectural Review Board for five years until 2022. He is the steward of two National Register listed properties: a 1920 bungalow in Virginia and a 1790s farmhouse in Maryland.