Corrected entry: Boone's job appears to change halfway through this episode. In the pilot he tells Jack that he's a licensed lifeguard. This still seems to be true at the start of White Rabbit, because he is the one who swims out to save Joanna. But later in the same episode, he mentions that he runs a business, which is elaborated on later: he tells Locke about his mother's wedding supply chain stores. The lifeguard job is never mentioned again.