Heisenberg is old enough to know how to design circuits that use vacuum tubes. He started out with computers by soldering together a Z-80 circuit board on his mom's kitchen table in the late 1970's. He still has that computer, as well as a VAX, and even has a few useful computers. After a 25 year sidetrack through gamma ray spectrometry and other things nuclear, he returned to computer hacking a decade or so ago. He is currently working as a manager and penetration tester supporting a department of the US Government. When not staring at a computer screen he is most often found staring out the screen of one of his vintage airplanes.