David Jones aka Rance, associated with DefCon. I believe I met him a couple of times. Here he is winning a competition at DefCon 21:
The contest was to break into an “office” and do a bunch of stuff – first pick the lock(s) on the door to get in, open a filing cabinet and a briefcase, get into the computer, etc. – in the least amount of time. Mostly there were teams of 3-4 guys competing; he won doing it all by himself.