If you are looking for offshore proof employment it is worth noting that defense contractors are scrambling to find qualified help. 3 conditions: 1. Work on site typically 100% because classified systems are not 'net connected. 2. No drug use. Not even THC, even if your state "legalized" it. Still illegal at the federal level. 3. No criminal history, at least in the last 10 years. 4. Must pass a FBI background check and clearance interview.