Continuity mistake: Before Michael is abducted by the Native Americans his pajamas swap from pink to white.
Continuity mistake: Wen Michael warns John and the lost boys about the Native Americans he is kicked out. In the aerial angle Michael's teddy bear disappears.
Continuity mistake: When we see the windows of the Darling nursery, at the start and at the end, their height repeatedly switches between having either five or six horizontal rows of glass panes.

Continuity mistake: In the scene where the crocodile attacks Hook at Skull Rock, there is a shot where the croc bites Hook's left foot and the shoe comes off, leaving Hook's left foot bare. In the shot with Hook wrapped around the croc's snout, the shoe is back on Hook's left foot and his right foot is bare.
Continuity mistake: After Peter Pan saves Wendy, the dagger sheath switches sides. (01:05:07)
Continuity mistake: During a sword fight between Peter Pan and Captain Hook, the dagger is in Peter's hand and when he flies towards the rope ladder, the dagger is suddenly back in its sheath. (01:06:57)
Continuity mistake: After Peter cuts the rope around the mast where the kids are tied, there's a brief shot of Peter standing sideways on the mast. Look below and you'll notice that the ropes have vanished.
Continuity mistake: At Hangman's tree, while the Lost Boys dance, Wendy grabs Michael's feather and tomahawk and lays them on the floor. A shot later they're nowhere to be seen.
Continuity mistake: After Tinker steps on Hook's map and draws an X where Peter is, the X and the ink spots on the paper disappear.
Continuity mistake: When Mrs. Darling is about to leave and Wendy is dozing, her pillow swaps from being opened and striped inside, to fully closed and totally white.
Continuity mistake: When Hook sits down to get a shave his chair is a couple meters away from the side of the ship. A shot later it's centimeters away.
Continuity mistake: When the bomb explodes, Wendy and the kids disappear from the side of the ship, only to reappear in the close-up.
Continuity mistake: When Michael checks who's underneath the moving tree, the tomahawk on the ground disappears between shots.
Continuity mistake: After Michael grabs the tomahawk stuck on a tree he walks to an area with grass. In the close-up he is standing on sand.
Continuity mistake: When John and the kids walk by the Native American area, in the aerial angle the Native American's footprints disappear.
Continuity mistake: When we see Tiger Lily tied up to the anchor, the left side of the rope goes over the right side. A shot later it's the other way around.
Continuity mistake: When the movie ends, Mr. And Mrs. Darling, Wendy and Nana are by the window looking at the sky. In the aerial angle they all disappear.
Continuity mistake: When the ship turns to gold and starts to fly everyone disappears.
Continuity mistake: After Hook swims away, Wendy asks Peter where are they going to. The rope behind her swaps positions between shots.
Continuity mistake: Peter cuts Hook's hat and feather. When Hook swims away, Peter grabs the hat to impersonate Hook and the hat is fixed.
Answer: In the original stage play by J.M. Barrie, he was a bank clerk. I don't think what he did for work was brought up in the 1953 film.
Bishop73