Sepp is a military historian with a passion for the unique history of the 10th Mountain Division. He served as the director for the 10th Mountain Division and Fort Drum Museum during their major relocation and redesign, re-opening the museum in 2022. Also a veteran of the 10th Mountain Division (2000-2004), Sepp deployed with the Division to both Afghanistan and Iraq before going on to retire from the Army in 2016. Currently, Sepp is pursuing other history projects, such as leading military history tours and helping families connect with their military history. He lives with his wife, Amy, in midst of the historic triangle of Virginia.