According to the bio on his website: "Jason Kasper enlisted in the US Army in June 2001. His first assignment was as a Ranger private, where he conducted operations in Afghanistan and Iraq before attending West Point. Jason then served as an Airborne Infantry and Special Forces officer, deploying multiple times to Afghanistan and Africa.
During his off-duty time he began running marathons and ultramarathons, skydiving, BASE jumping, and writing fiction. His last Army assignment was as a Green Beret team commander. Upon returning from his final deployment in 2016, Jason began his second career as an author with the publication of his debut novel, Greatest Enemy."