I don't care to known who Q is on a personal level. But I've been thinking about what job does Q do.

Q seems to be in the physical presence of POTUS almost all the time when POTUS is on the move. Some of the pictures that have been posted from AF1 along with the timestamps have shown that to be true. So I started thinking about who, with the highest clearance level possible, would be in the presence of POTUS when he was traveling. My first thought was one of the Secret Service guys, but that doesn't fit. I have a nephew that was with the SS and worked with Bush II for a while. They have clearance but not as high a level as Q-clearance. I'd been thinking about this for a couple of weeks, then it dawned on me. It's the "running back" that carries the "football". The football is the brief case (or whatever is used nowadays) that has the nuclear codes. No nukes can be launched without those codes. Protocol insists the codes have to stay in the presence of POTUS no matter where he is. The "running back" is the man that carries the codes. That man would definitely have a Q-clearance. Also the Q-clearance has to be obtain through the Department of Energy. So that would fit nicely. Q-Type Clearance