Where did John Paul II work?

Answer 1

John Paul (before he was Pope) worked at the clandestine seminary of Krakow led by Cardinal Adam Stefan Sapieha (Archbishop of Krakow).

As John Paul the Second, he worked at the Vatican where he ran the Catholic Church.

Answer 2

John Paul II worked at the Vatican City, serving as the Pope from 1978 until his death in 2005. He was the head of the Roman Catholic Church and the sovereign of Vatican City, which is the world's smallest independent state.