Final answer:
In 'The Alchemist' by Paulo Coelho, Santiago is offered the job of being a treasure hunter by the Al-Fayoum tribal chieftain.
Step-by-step explanation:
In the story 'The Alchemist' by Paulo Coelho, the Al-Fayoum tribal chieftain offers Santiago the job of being a treasure hunter as a reward for warning of invading armies. This job involves searching for hidden or lost treasures, using clues and historical information to locate them. Santiago embarks on a journey to pursue his personal legend as a treasure hunter, guided by the teachings of the Alchemist.