David is a former shooter/instructor with the United States Army Marksmanship Unit (USAMU). He has been training military and law enforcement personnel in firearms and tactics for over 35 years. He is a combat veteran with an extensive background in small unit operations. He is a Distinguished NRA Life Member, a life member of the U.S. Army Sniper Association, and a member of the International Association of Law Enforcement Firearms Instructors (IALEFI). When he is not at the SIG SAUER Academy teaching, his full time position at SIG SAUER is Technical Writing and Rifle Development.