>>542136694
The easiest way to get it is the military
They give everyone from Tyrone Brown to Cletus T. Chudd a security clearance if their job requires it, but if you have skills that are actually in demand, some companies that do contracting might sponsor you if you're willing to move to some big military clusterfuck area like DC, Norfolk, Texas, or SoCal.
Most smart people do their enlistment then fuck off to do contracting if they don't use the GI Bill