There has been speculation to Ana's occupation in another thread.

Gee....do you think she and Kate will intersect in the backstories? Both are due for a flashback episode.

---the bank robbery
---the shooting of Kate's old boyfriend (maybe Ana was a rookie and it was her bullet....and she carries the guilt of having killed an innocent....just like with Shannon now)
---a Wanted poster of Kate hanging up in the background

Do you think Ana will recognize Kate when they meet???

it seems to be the easiest to assume. and also good drama because when kate finds out ana has been beating on sawyer there are already gonna be sparks, add shannons death then sprinkle in some clashes in the past. thats a mean dharma moltov cocktail

That would be pretty cool. I've also seen it speculated that maybe Ana was a soldier and ran into Sayid during the Gulf War.

That would be pretty cool. I've also seen it speculated that maybe Ana was a soldier and ran into Sayid during the Gulf War.

now that, that right there, that would be frickin sweet