In "Great Expectations", what new job does Orlick have? What is Pip's reaction?

In Ch.29, Pip returns to his village from London and pays a visit to Miss Havisham's house hoping to meet Estella there. Anxious and nervous,after ringing the bell at the gate he turns his back  and waits expectantly for someone to open the gate and let him in.  He hears the gate open but continues to remain with his back to the gate. Then, when he feels some one tapping his shoulder he turns around and to his shock and surprise he realises that the gatekeeper who has let him in is none other  than Orlick himself.

Dickens describes Pip's reaction in the following words: "Being at last touched on the shoulder, I started and turned. I started much more naturally then, to find myself confronted by a man in a sober grey dress. The last man I should have expected to see in that place of porter at Miss Havisham's door. 'Orlick!' "

Pip's reaction is one of startled surprise at seeing Orlick as Miss  Havisham's gatekeeper, because he assumed that Orlick must have still been working at Joe's forge.