In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
It is forbidden to work in serving pork and its component to any person, Muslims or non-Muslims, because pork is defined as unclean in our religion and a Muslim may not serve, as food, unclean things for any person.
But if a Muslim works in a place, like supermarket or a restaurant, where pork and pork product are served/sold whereby the job of a Muslim does not include handling such items, this is permissible and that the compensation /salary, the Muslim gets for this work is halal, in sha’ Allah.
Allah Almighty knows best.