When I was in the military, many of those selected for jobs requiring Top Secret Security Clearances turned out to be Mormons.  They had several advantages over other soldiers.  They didn't use alcohol or illegal drugs; they didn't patronize prostitutes; many were in fact married by the time they served and their educational backgrounds often exceeded those of non-Mormons.   With a lack of criminal histories and the fact that all those things they didn't do have often resulted in the compromise of Classified information by those who were inclined to those vices, it was a no brainer.  I've heard anecdotal reports that non-military Federal Government organizations with security clearance requirements also have LDS types for the same reasons (CIA, FBI, NSA, etc.)   Check out the movie, "The Falcon and the Snowman".