The tech world is rife with gifted autodidacts. Demonstrate the talent and nobody gives a rip about credentials. The NSA is known for its ace team of counter hackers, many of whom earned their stripes in their Mom's basement.Gifted computer geek, my ass. High school dropout, CC dropout, armed forces dropout, security guard who somehow gets NSA job. Real brainiac this one.
Seriously, he was briefly in the military and so he knew how to act military and the NSA was good with that.