At first thought, probably an historian of some kind. I actually love doing research, and history is fascinating. And with so much information missing, it would be a very interesting challenge. Maybe some sort of artist on the side, too - the me now can't be separated from art, I doubt the me in SSSS would be.
But, I wouldn't be too bad as a scout, either, I think. I have infinite patience and the ability to be unnoticed. Also, I have no medical conditions whatsoever (which includes need of glasses etc.), and no allergies, bar a slight sensitivity to strong smells/smoke. The only sickness I ever seem to contract is the common cold. It might be possible to assume from that that I'd be immune. I'm also much more comfortable around a small amount of people, or none at all.