Troy D. Harman has been a National Park Service ranger since 1984, including stints at Appomattox Court House National Historic Park, Mammoth Cave National Park, Fredericksburg & Spotsylvania National Military Park, and Independence National Historical Park. Since 1989 he has worked at Gettysburg National Military Park, where he has become one of the battlefield's most popular and engaging rangers, with a devoted following on PCN, the Pennsylvania Cable Network. Harman, who holds a doctorate in history from Lehigh University, has published numerous articles in various Civil War publications, has spoken to Civil War Round Tables and seminars around the country, and appears regularly on the Pennsylvania Cable Network. He is an adjunct professor at Penn State University. He lives near Gettysburg.