James Hessler is a Licensed Battlefield Guide at Gettysburg National Military Park.

His book Sickles at Gettysburg (Savas Beatie, 2009) was awarded the R.E. Lee Civil War Round Table's Bachelder Coddington Award and the Gettysburg Civil War Round Table's Distinguished Book Award as the most outstanding work on the Gettysburg Campaign. Jim has been a guest on NPR, PCN-TV, Breitbart News, and Civil War Radio.

Jim has written several articles for publication and was one of the primary content designers for the Civil War Trust's mobile Gettysburg application and animated maps. He is a popular speaker at Civil War Round Tables and has taught courses for the Gettysburg Foundation and Harrisburg (PA) Area Community College.

He lives in Gettysburg with his wife and children.